Crostata, Peach

Ingredients

• 2 cups unbleached all-purpose flour
• 2 tablespoons stone-ground cornmeal
• 3/4 teaspoon salt
• 6 tablespoons sugar, divided use
• 1/2 cup unsalted butter, in small chunks, thoroughly chilled
• 2 tablespoons vegetable shortening, thoroughly chilled
• 1 egg
• 2 to 4 tablespoons ice water, as required
• 2 to 3 large peaches, peeled, pitted and cut into thin wedges
• 1 tablespoon peach brandy (optional)
• 2 tablespoons unsalted butter, cut into small pieces
• 1 beaten egg with 1 tablespoon half-and-half