Fry the fillet, bell pepper, garlic and onions one after the other in oil and place in a large roasting pan. Add the remaining ingredients and mix everything together. Cover and bring to the boil in the oven at 200 ° C.
Chill overnight and heat again at 200 ° C the next day. Maybe bind the sauce a little.
Rice, pasta or baguette, and possibly a green salad, go well with this.