Blend all ingredients for the sauce. Pour into a pan and heat until thickened, stirring with a whisk. Cover the bottom of a 9" x 13" baking dish with a think layer of sauce.
Mix all filling ingredients together.
Spread sauce on tortillas and fill tortillas with filling and roll. Line them up in the casserole dish--laying the filled tortillas seam side down.
Top with enchilada sauce, shredded cheese, and whole olives. Bake until hot--about 30 minutes at 350°F.