Peach Galette

Ingredients

• 1 ¼ cup all-purpose flour
• 2 tablespoons granulated sugar
• ¼ teaspoon salt
• ½ cup unsalted butter (cut into small cubes)
• 1 egg
• 2 tablespoons ice cold water
• 4 medium peaches (sliced ¼-inch thick)
• ¼ cup granulated sugar
• 2 tablespoons cornstarch
• 2 tablespoons lemon juice
• 1 tablespoon water