Brown ground beef in skillet, breaking up meat with fork.
Add onion. Saute until tender.
Add salt, pepper and barbecue sauce. Stir in beans and heat.
Place half of tortillas in bottom of greased 9 X 13 baking dish. Top with half of meat mixture. Repeat layers.
Sprinkle top with cheese.
Bake at 350 degrees for 20 minutes until heated through and cheese melts.
To serve, cut in squares. Sprinkle with green onion.