Potato Taco Casserole

1/2 lb ground beef 
1 pkg au gratin potatoes 
2 1/4 cups boiling water 
2/3 cup milk 
1 cup shredded taco-seasoned cheese 
1 cup coarsely broken tortilla chips 


Heat oven to 400 degrees. 


Cook beef in 10 inch skillet over medium heat 8 to 10 minutes, stirring occasionally, until brown; drain. Mix uncooked potatoes, sauce mix, boiling water and milk in ungreased 2 quart round casserole. Stir in beef and 1/2 cup of the cheese. 


Bake uncovered about 30 minutes or until top is light golden brown. Sprinkle chips over casserole; sprinkle remaining cheese over chips. Bake 3 to 5 minutes longer or until cheese is melted. Let stand 2 minutes before serving. 


Makes 5 servings.