Pizza Burgers
["1 lb. ground beef", "1/4 c. finely chopped onion", "1 tsp. salt", "1 (6 oz.) can tomato paste", "Mozzarella cheese", "1/3 c. grated Parmesan cheese", "1/2 tsp. oregano", "hamburger buns"]
["Combine all ingredients.", "Spread evenly on bottom half of buns.", "Broil until meat is cooked and edges of buns are toasting. Watch very closely.", "During last 2 minutes put 2 strips of cheese crisscrossed on top of each bun.", "Brown tops of buns."]
["ground beef", "onion", "salt", "tomato paste", "Mozzarella cheese", "Parmesan cheese", "oregano", "buns"]