In large bowl add 2 cups cheddar cheese, 2 cups monterey jack cheese, cooked chicken, sour cream,soup, chilies,onion,and salt and pepper. Mix well. Spoon about 1/2 cup of mixture off center of each tortilla, roll up and place seam side down in a greased 13x9 baking dish. I place what wouldn't fit in the tortilla's down the center of pan and then sprinkle the reaming cheese on top. Cover and bake at 350 for 20 minutes uncover and bake for another 10-15 minutes longer.
let stand 10 or so minutes before serving if they can wait that long... Enjoy!!