Peel the onion and cut into small cubes. Cut the peppers into thin rings and then cut the rings into small pieces again so that you get paprika strips.
Place the chicken breast fillets in a baking dish, distribute the onions and pepper strips evenly over the meat. Mix the tomatoes and the cream together, season with salt and pepper and pour this sauce evenly over the meat. The sauce should cover all of the meat. Put the whole thing in the oven for approx. 40 minutes at 200 ° C.