Ingredients:

• 1 cup (130g) all-purpose flour
• 1 teaspoon sugar
• 1/2 teaspoon salt
• 1/2 cup (1 stick) cold unsalted butter
• 1/4 cup full-fat sour cream
• 1 teaspoon milk or heavy cream, optional
• 1 tablespoon demerara sugar or granulated sugar, optional
• Cooking spray
• 3 to 4 medium peaches (about 5 cups sliced)
• 12 ounces (about 2 1/2 cups) fresh raspberries
• 3/4 cup granulated sugar
• 3 tablespoons cornstarch
• 1 teaspoon vanilla extract, optional
• 1 pinch salt