Wash the chicken breast fillets and pat dry. Peel the onions and cut them into rings.
Halve the bacon slices and fry in 1 tablespoon of hot oil, then remove and set aside. Fry the fillets briefly on each side, season with salt and pepper, then remove and set aside. Heat 2 - 3 tablespoons of oil and fry the onions in it. Chop the parsley, mix with thyme and add to the onions, sauté briefly.
Put 2/3 of the onions in an ovenproof dish. Place the fillets on top.
Dust the rest of the onions in the pan with flour and sauté briefly. Stir in the wine, 4 - 5 tablespoons of water, cream and stock powder. Let simmer for about 3 minutes. Season to taste and pour over the meat. Scatter the cheese with the bacon on top.