Cook and season ground beef with taco sauce in a skillet.
Take half of the tortilla shells and spread a thin layer of refried beans on them.
Add 2 tablespoons of ground beef to layer of refried beans.
Then, add a layer of cheese (about a tablespoon).
Top the layers with another tortilla shell.
Add remaining cheese to the top of the shells and microwave for 20-30 seconds.
Finish by topping the tortillas off with chopped green onions and tomatoes.