1 lb. ground beef
1/2-1 tsp. garlic salt
1/2 c. bread crumbs
1/2 c. milk
1/3 c. ketchup or sm. can tomato paste
1 sm. can sliced mushrooms
Cheese - American, Mozzarella

Mix all of the above and press into 9 inch pie plate. Top with slices of American, Mozzarella or Monterey Jack cheese. Sprinkle with oregano and Parmesan cheese. Bake in oven at 400 degrees for 20 minutes. Serve in pie slice wedges.