Ingredients
- 2.5 lbs red potatoes
- 1 onion
- 3 tablespoons butter
- 3 tablespoons flour
- 1 teaspoon dry mustard
- 2 cups milk
- 1 cup cheddar cheese
- ½ cup gruyere cheese
- salt & pepper to taste
Instructions
- Preheat oven to 400 degrees.
- Wash potatoes and slice into ⅛’ thin slices. Slice onion as thin as possible.
- Layer potatoes and onions in little stacks. Place stacks upright in a greased casserole dish.
- Melt butter & flour in a sauce pan and cook 2-3 minutes. Add seasonings and milk. Whisk over medium heat until thick and bubbly. Remove from heat and stir in cheeses until melted.
- Spoon cheese sauce over potatoes. Cover with foil (sprayed with cooking spray) and bake 60 minutes. Remove foil and bake an additional 20-30 minutes or until lightly browned and potatoes are cooked.
Source : allrecipes.Com
