1 lb. ground beef
2/3 c. evaporated milk
1/2 c. fine dry bread crumbs
1 tsp. garlic salt
1/2 c. ketchup
1 (2 oz.) can sliced mushrooms
1 c. sharp Cheddar cheese
1 tsp. oregano
2 tbsp. Parmesan cheese, grated

Mix the first 4 items in a pan. Pat evenly into an 8 x 8 inch pan. Spread with ketchup, mushrooms, Cheddar cheese, and oregano. Top with Parmesan cheese. Bake at 375 degrees for 30 to 45 minutes.