Pork kidneys, golden-brown sautéed onions, crushed caraway seeds, and thyme create a hearty dish with a bold flavor and a delicate sauce. Thorough cleaning and soaking in milk for several hours help mellow the kidneys and prepare them for further cooking.
This traditional recipe isn’t complicated, but it does require careful preparation and slow cooking. The kidneys become tender and blend with the onion base. They taste best with rice, which soaks up the sauce, but you can also serve them with bread dumplings or fresh bread if you prefer.
What You’ll Need
- 500–700 g pork kidneys,
- 1 large onion,
- 1 tablespoon lard,
- 1 teaspoon crushed caraway seeds, to taste,
- plain flour for dusting,
- stock, preferably beef or vegetable,
- salt,
- pepper,
- a few sprigs of thyme,
- milk for soaking the kidneys,
- rice as a side dish,
- optionally 1 tablespoon vinegar or a pinch of marjoram to finish.
The original recipe does not specify exact amounts of flour, stock, milk, salt, pepper, or rice, so adjust according to the desired consistency, taste, and number of servings.
Step-by-Step Preparation:
1. Cleaning the kidneys: Carefully clean the kidneys and remove all internal channels. Do not skip this step, as proper cleaning along with soaking is key to a milder flavor in the final dish.
2. Soaking in milk: Place the cleaned kidneys in milk and let them soak for several hours. The milk helps reduce their typical aroma and also softens the flavor.
3. Rinsing and slicing: Rinse the soaked kidneys thoroughly several times under cold water. Continue until the water runs completely clear, then slice them into strips.
4. Preparing the onion base: Finely chop the onion. Sauté it slowly and patiently in lard until it turns a nice brown color, which gives the sauce its rich flavor. You can substitute butter for lard, but lard gives a more traditional result.
5. Sautéing the kidneys: Add the sliced kidneys to the browned onions and sear them on all sides. Then sprinkle in the crushed caraway seeds and let them release their aroma briefly.
6. Thickening and adding liquid: Dust the kidneys and onions with a little plain flour and mix well. Pour in the stock, season with salt (considering the saltiness of the stock), add pepper, and a few sprigs of thyme.
7. Slow cooking: Simmer the kidneys gently for about 45 minutes, until they are tender and the sauce has the right consistency. Taste and adjust salt or seasoning as needed at the end.
8. Serving: Serve the finished kidneys hot with rice, which soaks up the onion sauce perfectly. Bread dumplings or fresh bread are also suitable sides.
Why Soak and Rinse the Kidneys
Soaking in milk and then rinsing thoroughly are among the most important parts of the recipe. Milk helps mellow the flavor and remove the typical aroma, while repeated rinsing gets rid of any remaining impurities.
After several hours in milk, rinse the kidneys until the water is absolutely clear. Do not skip or shorten this step.
How to Achieve a Rich Onion Sauce
Do not sauté the onions over high heat, but slowly, until they turn brown. A well-prepared onion base gives the dish a fuller flavor and a rich color. Use only enough flour so that after about 45 minutes of gentle simmering, the sauce has the desired consistency.
Final Tip
If you want to enhance the flavor of the kidneys even more, you can add a tablespoon of vinegar or a pinch of marjoram at the end. Add the seasoning only after tasting, so it doesn’t overpower the onion base, caraway, and thyme.
