Clean, wash and cover the beans and cook in boiling salted water for 12-15 minutes. Bring 100 ml water and 1 pinch of salt to the boil. Stir in puree flakes. Swell for about 1 minute. Season to taste
Peel onion, cut half into slices, dice the rest. Wash the fillet if necessary and dab dry. Fry in hot oil for 3-4 minutes per side. Season and place in an ovenproof dish
Wash, seed and dice the tomato. Wash and chop the parsley. Mix both with onion cubes and spread on the fillet. Spray puree as tuffs on baking paper. Bake both in a preheated oven (200 °C/ convection oven: 175 °C/gas: level 3) for 10-12 minutes
Fry the onion slices in hot frying fat. Stir in 100 ml water and stock and bring to the boil. Thicken sauce and season to taste. Serve everything