Tenderloin of Beef Roll tenderloin in cracked black pepper. cover with dishtowel and let stand 45 minutes to 1 hour. Place on hot mesquite coals and roll with fork until brown on outside. Or cook in conventional oven at 350 F for 45 minutes to 1 hour. Slice and serve medium rare. 8-10 cubed potatoes 1 large minced onion to taste salt and pepper to taste 4 oz. chopped pimiento 2 cups grated sharp cheddar cheese 2 cans cream of mushroom soup Boil potatoes and onions to barely tender. Drain. Blend with balance and heat in Dutch oven to hot or bake in 350 F oven for 30 minutes.