Corn and Tomato Gratin

Name: Corn and Tomato Gratin
Ingredients: 1 1/2 lb red or yellow tomatoes (4 medium), cut crosswise nto 1/2-inch-thick slices; 2 teaspoons salt; 1 teaspoon black pepper; 4 cups fresh corn kernels (from 6 to 8 ears); 1 cup whole milk; 1/2 cup heavy cream; 2 cups fresh bread crumbs (preferably from a day-old baguette; an 8-inch piece, including crust); 1/2 cup chopped fresh basil; 1 oz finely grated parmesan (1/2 cup); 3/4 stick (6 tablespoons) unsalted butter, cut into small pieces, plus additional for buttering pan