Tomato and Corn Pie with Fresh Basil

prepared pie crust, homemade or purchased

small tomatoes such as Roma (about 1 pound), sliced approximately 1/4-inch thick

Salt

freshly grated Parmesan cheese

all-purpose flour

fresh corn kernels (about 2 small ears of blanched corn)

scallions, white and light green part only, finely chopped

large leaves fresh basil, torn into 1/2-inch pieces plus more for garnish

shredded sharp Cheddar cheese

large eggs

half-and-half

Freshly ground black pepper,