Sirloin steak; 1 1/2 inch thick, 1/3 to 1/2 lb. per person
Mushrooms, 2 to 3 per person
Onions; med. size, 1 to 2 per person
Cherry tomatoes, 1 per person

Cut steak into large cubes; parboil onions for about 15 minutes and cut into quarters. Rub skewers with oil. Spear cubes of steak, mushrooms and onions alternately on skewers. Brush with melted butter and sprinkle with salt and pepper. Cook over barbecue grill or fire to desired tenderness, placing tomatoes on end of skewers for last 5 to 10 minutes of cooking time.