Peel and finely chop the onion. Clean the mushrooms, possibly wash and halve them. Wash parsley and dab dry. Pluck the leaves from the stems, except for a few for garnishing, and chop finely.
Wash the chicken fillets, dab dry and cut in half lengthwise. Wrap 1 slice of bacon around each chicken fillet. Heat oil in a pan. Fry the chicken fillets until golden brown all around. Take them out and put them into an ovenproof casserole dish.
Sauté the mushrooms in hot frying fat until firm. Add onion and fry briefly. Deglaze with mushroom soup and bring to the boil. Add half of the parsley to the sauce. Fill everything into the casserole dish.
Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 15-20 minutes. In the meantime, prepare rice in boiling salted water according to package instructions. Garnish the casserole with the remaining parsley.
Add rice.