In a medium bowl, combine all of the ingredients, except the tortilla chips; mix well. Transfer the mixture to a 1-quart casserole or a 9-inch pie plate; spread evenly to edges.
Bake, uncovered, in a 350 degree F oven for 30 minutes for the casserole or 20 minutes for the 9-inch pie plate. Serve with tortilla chips. Makes 15 appetizer servings.