Heat oven to 400 F. Generously greese pie plate, 10x1 1/2". Cook and stir ground beef, onion and garlic in skillet until brown; drain. Stir in chili powder, oregano, salt, pepper and 1/2 c of the taco sauce. Sprinkle crushed torilla chips evenly in plate. Top with 1 1/2 c. Of the cheese; spread with beef mixture. Beat milk, eggs and baking mix until smooth, 15 seconds in blender on high or 1 minute with hand beater. Pour into plate.

Bake until knife inserted in center comes out clean, 25-30 minutes. Spread remaining taco sauce over top. Sprinkle with remaining cheese. Bake until cheese is melted 3-5 minutes longer. Cool 10 minutes. Serve with chopped tomato, shredded lettuce and dairy sour cream if desired.