Beef in Spanish sauce

I really like baked beef meat in Spanish. Since it is tough, you need to pickle it from the beginning. To do this, we take red wine, but do not be surprised, it will give our culinary recipe an unusual taste and smell. If you didn't have it at hand, then you can have dry white. The meat can also be marinated in it, but the taste will be slightly different.
1. Add garlic, bay leaf, cloves, salt and pepper to the wine. Pour this liquid over the beef and put it in the refrigerator overnight.
2. Preheat the oven to 160 degrees about 10-15 minutes before cooking.
3. Remove the meat from the marinade and put it in a deep baking dish (you can take a suitable frying pan with high sides or a duck house). Strain the marinade so that only liquid remains in it, pour it over the meat.

4. Put the form with the meat in the oven and simmer at 160 degrees for about 6 hours. During baking, the meat should be periodically turned over so that both the top and bottom have time to melt in the marinade. The time and temperature are indicated approximately, be guided by your technique.
Tip: if there is no time, then the same meat can be cooked faster by increasing the baking temperature to 200 degrees, then it will take about 2 hours to bake (after an hour, the meat must be turned over to the other side). 
In both slow and faster cooking methods, you need to make sure that the meat does not remain without liquid: periodically pour marinade over the meat from above, and if there is too little marinade left, pour a little hot water into the form with meat.

Keep in mind that everyone's ovens are different. The temperature and cooking time may differ from those specified in the recipe. To make any baked dish successful, use useful information about the features of ovens !

5. Shortly before the end of cooking the meat, we will prepare the sauce. Chop onion and pepper, fry, add tomato paste here. Simmer on low heat and at the very end add flour, olives and champignons.
6. Put the finished beef on a large plate and pour over the unique sauce.