1 pound ground beef or a mixture of ground beef and italian sausage
4 teaspoons pizza or italian seasoning -- divided
1/2 teaspoon garlic powder
1/2 cup shredded mozzarella cheese
8 ounces tomato or pizza sauce
4 ounces sliced mushrooms -- drained
1/2 cup sliced onion
4 toasted hamburger buns
How to make it
Combine ground beef, 2 teaspoons pizza seasoning and garlic powder. Shape into eight thin patties.
Top four of the patties with cheese. Cover with remaining patties; press edges to seal. Refrigerate until needed. Combine tomato sauce, mushrooms and remaining pizza seasoning in small saucepan; simmer for 10 minutes, stirring occasionally. In non-stick skillet, saute onion until tender; set aside. Grill, broil, or pan fry burgers until no longer pink.
Spread bottoms of buns with a little sauce, top with burgers, onion and remaining sauce. Replace tops.