Easy Cheesy Hot Dog Casserole - cooking recipe

Ingredients

1 pkg. au gratin potatoes
2 1/2 c. boiling water
2/3 c. milk
1 1/2 c. sliced frankfurters (10)
1 c. shredded Cheddar cheese
2 c. corn
1/2 c. finely chopped onoin
2 Tbsp. margarine
1/8 tsp. dry mustard (if desired)

Preparation

Heat oven to 400\u00b0.
Mix all ingredients together in 2-quart casserole.
Bake, uncovered, until potatoes are tender.