Potatoes au Gratin

By margiekyle

Ingredients

• 2-1/2 lb. baking potatoes (about 6)
• 1/4 cup butter
• 1 small onion, chopped
• 1/4 cup flour
• 1 tsp. salt
• 2-1/2 cups milk
• 1-3/4 cups KRAFT Shredded Sharp Cheddar Cheese, divided
• 1/2 tsp. GREY POUPON Dijon Mustard
• 1/4 cup KRAFT Grated Parmesan Cheese

Details

Servings 8
Preparation time 30mins
Cooking time 60mins
Adapted from kraftrecipes.com

Preparation

Step 1

COOK potatoes in boiling water 20 min. or just until tender; drain. Cover with cold water; cool.

MEANWHILE, melt butter in medium saucepan on medium heat. Add onions; cook and stir 2 min. Blend in flour and salt; cook 1 min. Gradually stir in milk; cook 5 min. or until thickened, stirring constantly. Add 1-1/4 cups cheddar; cook and stir 1 min. or until melted. Stir in mustard.

HEAT oven to 375°F. Peel potatoes; cut into 1/4-inch-thick slices. Layer alternately with cheese sauce in 2-qt. casserole sprayed with cooking spray, ending with sauce.

BAKE 25 to 30 min. or until heated through. Top with remaining cheeses; bake 5 min. or until melted.