How to Make It
Preheat oven to 425°F. Heat oil in a large skillet over medium-high. Add beef and onion; cook, stirring to crumble, until onions are softened and meat is browned, about 5 minutes. Stir in taco seasoning and salsa until combined. Cook 2 minutes, and remove from heat.
Place 1 pie crust in bottom of a pie plate. Spread refried beans evenly over crust; sprinkle with 1/2 cup of the cheddar. Top with beef mixture, and then spoon green chiles evenly over beef mixture; sprinkle with remaining cheese. Top with remaining pie crust; lightly press edges of crust together to seal.
Bake in preheated oven 30 minutes, tenting edges with foil during the last 10 minutes if crust becomes too brown. Let stand 10 minutes before serving. Serve with desired toppings.