Tomato and Corn Pie

Ingredients

• 2 cups all-purpose flour
• 1 tablespoon baking powder
• 1 3/4 teaspoons salt
• 3/4 stick (6 tablespoons) cold unsalted butter, cut into 1/2-inch cubes, plus 2 teaspoons melted
• 3/4 cup whole milk
• 1/3 cup mayonnaise
• 2 tablespoons fresh lemon juice
• 1 3/4 lb beefsteak tomatoes, peeled (see cooks' note for mountain jam ) and sliced crosswise 1/4 inch thick
• 1 1/2 cups corn (from about 3 ears), coarsely puréed in a food processor
• 2 tablespoons finely chopped fresh basil
• 1 tablespoon finely chopped fresh chives
• 1/4 teaspoon black pepper
• 7 oz coarsely grated sharp Cheddar (1 3/4 cups)

Directions

1. Whisk together flour, baking powder, and 3/4 teaspoon salt in a bowl, then blend in 3/4 stick cold butter with your fingertips or a pastry blender until it resembles coarse meal. Add milk, stirring until mixture just forms a dough, then gather into a ball.
2. Divide dough in half and roll out 1 piece between sheets of plastic wrap into a 12-inch round (1/8 inch thick). Remove top sheet of plastic wrap, then lift dough using bottom sheet of plastic wrap and invert into a 9-inch glass pie plate, patting with your fingers to fit (there will be just enough dough to line plate without an overhang). Discard plastic wrap.
3. Preheat oven to 400°F.
4. Whisk together mayonnaise and lemon juice. Arrange half of tomatoes in crust, overlapping, and sprinkle with half of corn, 1 tablespoon basil, 1/2 tablespoon chives, 1/8 teaspoon pepper, and 1/2 teaspoon salt. Repeat layering with remaining tomatoes, corn, basil, chives, pepper, and salt, then sprinkle with 1 cup cheese. Pour lemon mayonnaise over filling and sprinkle with remaining cheese.
5. Roll out remaining piece of dough into a 12-inch round in same manner, then fit over filling, folding overhang under edge of bottom crust and pinching edge to seal. Cut 4 steam vents in top crust and brush crust with 2 teaspoons melted butter.
6. Bake pie in middle of oven until crust is golden and filling is bubbling, 30 to 35 minutes, then cool on a rack. Serve warm or at room temperature.