1 tbsp 15mL butter or margarine
1 lb 500g lean ground beef
1/2 cup 125mL chopped onion
1 tsp 5mL
5 1/2 oz 156mL canned tomato paste
1 tsp 5mL Worcestershire sauce
1 tsp 5mL Italian seasoning
6 English muffins, split and buttered
6 mozzarella cheese slices
2 tbsp 30mL grated Parmesan cheese
1/4 cup 50mL chopped green onion