Farmers' Market Quiche

pre-baked pie crust (see recipe below)

assorted tomatoes, cut into ½-inch thick slices and drained on a paper towel

olive oil

small zucchini, sliced ½ inch thick

of a red onion, sliced thin

large eggs

half-and-half, or whole milk

unbleached all-purpose flour

salt

dry mustard

fresh ground pepper

cayenne pepper, more or less to taste (optional)

fresh basil, chopped, plus extra for garnish

shredded Gruyere Cheese

Paprika