Monterey Jack cheese,
Heat enchilada sauce until warmed through. Pour about a cup of sauce into a baking dish.
Pan Method: Heat oil in skillet. Using tongs, dip tortillas into hot oil to soften.
Microwave Method: Microwave tortillas until warm to soften. This method is easier and probably a little healthier, but not quite as tasty.
Dip in sauce to drench and place in baking dish. Sprinkle in a bit of the onion and cheese, roll up. Repeat with remaining tortillas, trying to fit all of them in the dish in one layer.
Pour remaining sauce over enchiladas, and sprinkle with remaining cheese. Sprinkle olives on top, and bake for 15-20 minutes at 350 degrees or until heated through.
Garnish with chopped green onion just before serving. You can also fill with cooked chicken or shredded beef along with the onion and cheese.
Saute onion in a little butter or oil just until transparent. Set aside.