Dice the onion and sauté until translucent, cut the chicken breast fillet into strips and fry. Cut the carrots and zucchini into strips and add to the chicken. Spice up. Take out of the pan and put in a baking dish. Mix and season the creme fraiche and processed cheese and pour over the chicken and vegetable mixture. Bake in the preheated oven at 200 degrees (E) or level 3 (G) for about 15 minutes. Noodles or rice go well with this.