Method
Cook onion in butter until transparent. Blend in flour, add milk and cheese; cook, stirring, until cheese is melted and mixture in slightly thickened.
Put a layer of egg slices in bottom of a 9" x 13" baking dish. Pour half the cheese mixture over eggs, then half the chips, then half the bacon. Repeat layers.
Bake for 45 minutes at 350 degrees F or until cooked through.
Yields: 8 servings.