If the goods are frozen, let the chicken breast fillet thaw. Cut the broccoli into small pieces and cook in a little water until firm to the bite. Cut the chicken breast fillet and the bell pepper into small cubes.
Cut the onion into small pieces, press the garlic and sauté both with a little oil in a pan. Add the chicken and fry. Add the pre-cooked broccoli and fry for a few minutes. Then add the pepper cubes and fry them too. Put the crème fraîche and the cream in the pan and stir well. After a few minutes, take the pan off the heat. Season the dish with salt and pepper.
Preheat the oven to 180 ° C top / bottom heat and place the contents of the pan in a baking dish. Sprinkle the vegetables and meat with the cheese and bake for about 12 minutes.