Impossible Beef Enchilada Pie

1 pound ground beef
1 cup chopped onion
2 cloves garlic, finely chopped
2 teaspoons chili powder
1/2 teaspoon dried oregano leaves
1/2 teaspoon salt
1/4 teaspoon pepper
8 ounces taco sauce
2/3 cup finely crushed tortilla chips
2 cups shredded Cheddar cheese (8 ounces), divided
1 1/4 cups milk
3 eggs
3/4 cup Bisquick

Heat oven to 400 degrees F. Grease a 10-inch pie plate.

Cook and stir ground beef, onion and garlic until brown; drain. Stir in chili powder, oregano, salt, pepper and 1/2 cup taco sauce. Sprinkle tortilla chips evenly in plate. Top with 1 1/2 cups 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 to 30 minutes.

Spread remaining taco sauce over top; sprinkle with remaining cheese. Bake until cheese is melted, 3 to 5 minutes. Cool 10 minutes.

Serve with chopped tomato, shredded lettuce and sour cream if desired.

6 to 8 servings.