Shrimp Quiche

1 (9-inch) partially-baked pie shell
1/2 pound shrimp, cooked, diced
1/4 cup scallions, sliced
Pinch of pepper
1 cup heavy cream or half-and-half
3 eggs
2 fresh tomatoes, sliced
1/4 cup Swiss cheese, grated
2 tablespoons butter

Saut