Preheat oven to 375°F. Spray a 9" pie plate with cooking spray.
Heat a large skillet over medium-high heat and brown the ground beef.
½ lb beef
Season beef with taco seasoning and mix until all the beef is evenly covered. Add the diced onions, salsa, and cook for 2 minutes. then remove from heat and set aside for later use.
½ cup onion, 1 tbsp taco seasoning, ½ cup salsa
Place one tortilla in the pie pan allowing the tortilla to cover the bottom of the pie plate and go up the sides. Top with refried beans and spread evenly to cover the tortilla.
2 12 inch flour tortillas, 8 oz refried beans
Spoon the taco meat over the beans and spread evenly. Spread the cheese evenly over the meat layer. Place the 2nd tortilla on top of the taco and press down around the sides gently.
1 cup Mexican cheese blend
Bake in the preheated oven for about 15-20 minutes until lightly browned.
Remove from the oven and allow to cool for 5 minutes.
For the Garnish:
Garnish with a layer of guacamole on top of the pie. Spread a layer of sour cream on top of the guacamole. Put a layer of lettuce on top of the sour cream. Sprinkle the tomatoes, olives, green onions, and cilantro on top.
¼ cup guacamole, ¼ cup sour cream, 1 cup lettuce, ½ cup tomatoes, ¼ cup black olives, 1 tbsp cilantro, ¼ cup green onions