My thoughts on Slackware, life and everything

Month: March 2012 (Page 1 of 2)

Recipe: zoervleis (sour meat)

I wanted to try something new for diner this weekend, and since my wife had already planned a Lasagna I wanted to compensate with meat & potatoes. I decided to try the dish which is famous in my city of birth Maastricht. It is called zoervleis (a word in the Limburg dialect which translates to sour meat). Even though I have been eating it regularly all my life (my wife likes to cook it) I never actually attempted to make zoervleis myself.

Zoervleis is a stew, typically meant to do something useful with meat that would otherwise not be eaten: by marinating meat, usually horse’s meat, in vinegar for hours or even days, even the toughest meat can be made tender.

In my recipe below, I used pork steak. This does not have to marinate for hours like other types of meat (like beef). Instead, I prepared the stew a day in advance so that the meat can rest in the acid liquid overnight, effectively giving it the same tenderness. If you use beef or horsemeat (zoervleis is typically made with horsemeat) you need to marinate the meat for 12 to 24 hours in the same mix of vinegar, water, cloves, juniper berries and bay leaf which is used below to cook the stew.

 

Ingredients:

  • 500 grams of meat, cut into 3cm chunks
  • 3 large onions, sliced into (quarter) rings
  • 3 cloves of garlic, finely chopped
  • butter
  • pepper, salt to taste
  • 25 cl vinegar
  • 25 cl water
  • 3 cloves
  • 4 juniper berries
  • 1 bay leaf
  • 2 tbs (tablespoon) of muscovado (brown sugar)
  • 2 tbs sweat-sour apple syrup (the “rinse appelstroop” from the province of Limburg)
  • 1 slice of gingerbread (typical dutch “ontbijtkoek”)

Preparation:

For cooking a stew, you need an iron kettle with a thick bottom. This will ensure that the heat from the flame is distributed evenly and will allow you to simmer the meat on a small fire for a long time.

The night before you serve the zoervleis:

  • Heat the butter until it stops bubbling (which means the watery components have evaporated) and begins to darken. Fry the meat for about 5 minutes until the chunks have a nice brown colour.
  • Turn the heat down a bit and add the sliced onions and chopped garlic. For the next 5 minutes or so, stir the meat plus onions from time to time until the onions have turned a golden brown.
  • Add pepper and salt to taste
  • Add the cloves, juniper berries, bay leaf, vinegar and water (these are the ingredients which you can alternatively use as the marinade if the meat needs tenderizing before you start cooking. Note that the pork steak I used does not need marinating)
  • Bring the mixture back to the boiling point, and then add the muscovado, apple syrup and gingerbread (these ingredients add the necessary sweet counterbalance to the sourness of the vinegar)
  • Put the lid on the kettle, turn the flame down as low as you can, and leave to simmer for at least two hours

The next day:

  • The zoervleis has rested in the acidic liquid overnight, which has allowed the meat to become tender and the aromas to mix. You’ll notice that the stew is no longer watery – the liquid is being bound by the other ingredients.
  • Put a very low flame underneath the kettle and let the stew slowly heat up for an hour.
  • Ready!

You serve zoervleis with apple sauce and pommes frites (french fries if you are american, or chips if you are british).

Instead of serving pommes frites, I cooked a few potatoes for about 10 minutes, let them cool down, cut them into slices of half a centimeter thick and fried those slices in a shallow pan in butter for another 15 minutes. Nice and crispy!

Enjoy this dish from my home county!

Eric

 

Image taken from http://ah.nl/

VLC 2.0.1

The newest release of the VLC media player is ready. From the version 2.0.1’s announcement it becomes clear that “This release brings a lot of bugfixes (over 110) and more stability of the young Twoflower. This is also a security update for SA1201 and SA1202“.

Since there are no source tarballs available for download yet, I created those from the “2.0.1” tag in the VLC repository and built my packages using those sources. When the official tarball becomes available, I will add that to my repository instead of the git checkout (the official source tarball will be smaller because it does not have all the git commit history).

All the internal libraries which I use for creating this VLC media playet package (ffmpeg, x264, libvpx, lame, etc…) were kept unchanged. The new VLC code (and the two securiry fixes) is what matters. There is one thing I did fix however. Thanks to an attentive Slackware user I fixed the missing support for the Open Sound System (OSS) Apparently my VLC 2.0.0 package (as opposed to the previous 1.1,x versions) was unable to use OSS for its sound output. It turns out that I had to enable support for OSS explicitly in the code. I verified that OSS is again available in the sound preferences of the player.

This is where you’ll find the packages:

My usual warning about patents: versions that can not only DEcode but also ENcode mp3 and aac audio can be found in my alternative repository where I keep the packages containing code that might violate stupid US software patents.

Have fun! Eric

Make firefox understand downloaded files

 It is quite annoying that Firefox always forgets what application to use for “opening” a file which you just downloaded. Also, the context menu “Open containing folder” in the Downloads overview does not work. Thanks to a hint from user cendryon in  a discussion at LinuxQuestions.org, a clean and simple solution surfaced which I had not thought of myself (even though I implement the same techique in my Dropbox client package):

Using “xdg-open” you can improve the integration of Firefox into your Desktop Environment a lot:

  1. Stop firefox if it is running
  2. Delete or rename the mimetypes cache (where firefox keeps its file association settings):
    $ rm ~/.mozilla/firefox/<yourprofile>/mimeTypes.rdf
  3. Start firefox again
  4. Download any file if you had not done this before
  5. Open that file from the “Tools > Downloads” menu (by right-clicking on it and selecting “Open“). When asked to choose the application for opening the fike, browse to “/usr/bin/xdg-open“. then check the checkbox to “Remember your choice“.

After you’ve configured Firefox like that, both the  “Open” and “Open containing folder” context menus will work. If you are running KDE (which was the subject of that discussion on LQ.org) you can then change the preferred programs through KDE’s “file associations” settings. Brilliant.

Have fun,

Eric

Common questions on Akonadi and Nepomuk in KDE PIM 4.8

 I am not usually a copy/paste kind of guy but I thought it is good to have the following information visible on this blog instead of “just” being a forum post.

I was triggered by a linuxquestions.org post which pointed to another post on forum.kde.org called “Common questions on Akonadi and Nepomuk in KDE PIM“. The post contains a Q&A between one of the board admins and Christian Mollenkopf. This is its full text, copied verbatim (and reformatted for this post). I hope this helps some people who wonder why their PC is so busy indexing on every boot.

 

Q&A session with Christian Mollenkopf:

Starting from version 4.7, KDE PIM has integrated Nepomuk for many operations such as search, message tagging, and address auto-completion. This post answers some of the common questions related to the state of this integration.

Q. Will email which is encrypted be indexed in any form, or will it be ignored?
A. It will be ignored since the search index is not secure.

Q. Will the indexer attempt to match the contents of my address book against emails?
A. Yes, the extracted contacts should be merged by email address.

Q. What occurs when email is read or deleted using other clients on shared mail boxes (such as IMAP mail boxes)?
A. It’s either removed or re-indexed.

Q. If the IMAP server supports it, does Akonadi use the server’s search capabilities or index it using Nepomuk anyway?
A. The indexer is protocol agnostic, that is, it works regardless of the server type used, be it POP, IMAP, or local mailbox. If a supported item (a message) is in Akonadi, it’s indexed. If it is changed it’s reindexed, and if it is deleted it’s removed from the index. It doesn’t really matter where the item is coming from.

Q. The performance of mail indexing is slow, how can it be improved?
A. There are different ways to achieve that:

  • Index only what you need. Right click on a folder, select Folder Properties, then the Maintenance tab, then “Disable fulltext indexing“: this will disable indexing for that specific folder;
  • Turn off email indexing altogether by unchecking the relevant option in System Settings, Desktop Search (only available from 4.8 and later);
  • Wait until initial indexing has completed. Indexing is completed when the akonadi_nepomuk_feederrc file in your KDEHOME/share/config directory (KDEHOME is usually .kde or .kde4) contains the following:
    [InitialIndexing]
    IndexCompatLevel=3
  • Locate the akonadi_nepomuk_feederrc file and change DisableIdleDetection to true:
    [akonadi_nepomuk_feeder]
    DisableIdleDetection=true

    This will cause the feeder to keep on indexing regardless of idle status, increasing CPU usage significantly but on the long run reducing the time to complete indexing. As a matter of fact, the real performance issue is the initial indexing, as it can take very long (days with large mailboxes), and is restarted if interrupted (i.e. because of a restart, not by sleep-mode or alike). Once initial indexing is over, performance will be significantly better. The KDE PIM developers are aware of this problem and will work on a solution.

Eric

Jean Giraud (Moebius) dies march 10, 2012

Image source: Wikipedia

Jean Giraud, better known as Moebius, died yesterday at the age of 73, after he lost a long battle against cancer. Moebius developed a unique art style, known by many people although not everybody will realize this.

When I was a kid, I read his Blueberry comics in the weekly magazine I was subscribed to. When I grew up and my interest in graphic novels was renewed by the friends I made at university, I discovered the “adult” (as in: not kid-oriented) comics drawn by Moebius and was fascinated by the dark, yet vivid style of these drawings. The frames are explosions of colour – much different from the Blueberry style.

Not only did he create many comic strips (graphic novels would be a better description), he contributed story boards and conceptual artwork to several well-known movies like Alien, The Abyss and Tron. His Incal series was the inspiration for the movie The Fifth Element.

His drawing style can be characterized as “ligne claire” of which Hergé (the creator of Tintin) was another well-known exponent. However, the atmosphere of the stories these two artists created are near opposites.

I felt deep regret when I read that this great contemporary artist passed away. Let’s remember him through his works of art.

Eric

Image source: lambiek.net

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