Family Christmas Fillet - cooking recipe

Ingredients

10 to 12 pieces fillet
2 sticks butter
3 large onions
2 lb. mushrooms
2 large bottles ketchup

Preparation

Cut meat in 2 pound chunks.
Melt butter in large roasting pan.
Chop onions and saute in butter until onions are tender. Slice mushrooms in half or quarters.
Add to onion/butter mixture and coat.