New Potatoes Gratiner - cooking recipe

Ingredients

1/2 stick margarine
1/4 c. warm water
1 small onion, finely chopped
1/4 c. finely chopped parsley
1 medium garlic clove, minced
1/4 tsp. freshly ground pepper
1/2 lb. fresh mushrooms
2 lb. small red-skinned potatoes, thinly sliced
3 oz. shredded Swiss cheese
1/2 tsp. salt
1 1/2 c. heavy cream

Preparation

Preheat oven to 325\u00b0.
Grease a 13 x 9-inch Pyrex dish.
Trim mushroom stems flush with cap.
Thinly slice lengthwise.
In large bowl, toss potatoes, mushrooms, onion, parsley, 2 ounces cheese, garlic, salt, pepper and 1 1/2 tablespoons melted butter.
Place in prepared dish.
Mix 1/4 cup warm water with 1 1/2 cups heavy cream and pour over potatoes.
Sprinkle with remaining cheese.
Dot with butter.
Bake for 1 1/2 hours.
As soon as cheese browns, cover with loose tent of foil and continue baking.