This peach crumble tastes like summer and is so simple to make. No rolling pastry or fussing with frosting required. You can use peaches or nectarines, the filling is just the sliced fruit tossed with sugar and a touch of lemon juice. The simple topping is made with butter, light brown sugar, and flour. You don't even need to grease the baking dish! It's the fruit dessert of your dreams!