French Bean Casserole

2 pounds fresh string beans, cut French style (lengthwise)

2 cups sweet onions, thinly sliced

2 tablespoons butter

1 tablespoons flour

1/2 teaspoon crushed basil

1-2 thinly sliced tomatoes

1/3 cup bread crumbs

1/4 cup grated Parmesan cheese

2 tablespoons melted butter

Preheat oven to 350°F.

Cook beans. Sauté onions in butter until tender, then stir in flour. Layer half of onions and half of beans in 1 1/2-quart casserole. Sprinkle with basil, top with remaining onions and beans. Top with tomato slices, bread crumbs, cheese, and melted butter. Bake 25 minutes.