For the crust – 2 sticks (1 cup) unsalted butter, softened – 1/4 cup brown sugar – 1/2 teaspoon salt – 2 cups flour For the filling – 1/2 cup peach jam – 3 large peaches, thinly sliced – 12 ounces cream cheese, softened – 1/4 cup sour cream – 1/2 cup granulated sugar – 2 large egg – 1 teaspoon vanilla extract For the topping – 1 cup flour – 1/4 cup brown sugar – 1/4 cup granulated sugar – 1/2 teaspoon ground ginger (optional) – 1 teaspoon cinnamon – 1/4 teaspoon salt – 1 stick (1/2 cup) butter, melted