First marinate the meat (see instructions). Put 3 spoonfuls of olive oil in the saucepan and fry the meat for a few seconds. Place the carrots, onions and celery in baking pan and on top of these, place the meat. Next add the water. Bake the meat in the oven in 220 - 250 degrees C for 10 - 15 minutes and then in 140 - 160 degrees C for 50 - 60 minutes. When meat is ready let it cool down and then cut in thin slices. Put the cooked vegetables in the blender, blend well and strain in a small saucepan. Add little bit of bring the sauce to boil until it thickens.