Brown the meat and onion together.
Stir in all the ingredients, except the tortillas and cheese.
Spread about 1/3 cup of this mixture on each flour tortilla and roll to close.
To assemble the dish, spread some of the sauce in the bottom of a large baking pan.
Put the rolled up tortillas, fold side down in the pan.
Pour the remaining sauce over the tortillas and top with cheddar cheese.
Bake uncovered at 350 degrees for 15-20 minutes, or until they are heated through.