1 lb. ground beef
1/2 lb. Spam, grated
1/2 tsp. salt
1 tsp. oregano
1 jar (15 oz.) spaghetti sauce
8 oz. grated Mozzarella cheese
8 oz. grated Cheddar cheese
12 hamburger buns

Brown ground beef. Mix in rest of ingredients and heat to boiling. Cook until cheeses are melted. Spoon on buns. Wrap in foil and bake for 12 minutes at 425 degrees. Can be frozen for later use.