1Add 700 grams of liver sliced into strips in a large bowl.
2Add 200 milliliters of milk.
3Mix and let the liver soak for five minutes.
4In another large bowl, add 1 teaspoon of garlic powder, 1 teaspoon of sweet paprika, 1 generous pinch of black pepper, 1 teaspoon of oregano, and 3 garlic cloves chopped into cubes.
5Add 2 tablespoons of white vinegar and 2 tablespoons of soy sauce.
6Mix until incorporated.
7Drain all the milk from the liver.
8Transfer the liver to the bowl with the seasoning mix.
9Add 1 teaspoon of salt and mix until incorporated.
10In a large skillet over medium-low heat, add 1 drizzle of vegetable oil, the liver, and braise it until slightly golden brown.
11Add 1 onion chopped into round slices, 1/2 green bell pepper chopped into strips, 1/2 yellow bell pepper chopped into strips, and 1/2 red bell pepper chopped into strips.
12Add 150 milliliters of water and 2 tablespoons of tomato paste.
13Stir all the ingredients together very well.
14Cover the skillet and let it all cook for 10 minutes.