Three-Potato Gratin - cooking recipe

Ingredients

1 Tbsp. butter
2 1/2 c. heavy cream
1/4 c. Dijon mustard
1 1/2 tsp. cornstarch
1 tsp. salt
1/2 tsp. pepper
1 1/4 lb. each: yams and Idaho potatoes, peeled and thinly sliced
1 tsp. fresh thyme leaves, crumbled

Preparation

Preheat oven to 325\u00b0.
With the butter, grease 3-quart shallow baking dish.
In bowl, mix cream, mustard, cornstarch, salt and pepper.
Add yams and potatoes; toss.
Pour into prepared dish. Cover and bake 1 hour; uncovered, bake 30 minutes or until potatoes are tender and golden.
Let sit 10 minutes.
Sprinkle with thyme. Makes 12 servings.