Haricots Verts au Gratin

• 1½ pounds thin string beans
• salt
• butter
• ¾ pint <

Poach string beans in salted water for 20 minutes, or until almost tender. Drain. Place in a well-buttered gratin dish and cover with cream. Season to taste with salt and freshly ground black pepper, and place in a preheated hot oven (450°F-M7) for 20 minutes. Sprinkle with fres