Spicy Beef Sandwiches - cooking recipe

Ingredients

6 to 10 lb. sirloin tip or rump roast *
1 onion, finely chopped
1/4 c. Worcestershire sauce
2 Tbsp. garlic salt
2 to 4 Tbsp. chili powder
salt and pepper to taste
Swiss or Provolone cheese (optional)

Preparation

*Makes enough for a large crowd.
Use lesser amounts of spice for smaller roasts.