Preheat oven to 350℉ (175℃) and butter a 2-quart or 8x8 baking dish.
In a large mixing bowl, combine the sliced peaches, 1 teaspoon lemon zest, 2 tablespoons lemon juice, 1½ tablespoons cornstarch, and ¼ cup granulated sugar. Let that mixture sit for 5-10 minutes while you prepare the peach crisp topping.
In a separate mixing bowl, mix together ⅓ cup all-purpose flour, ⅔ cup brown sugar, ½ cup old-fashioned rolled oats, ½ teaspoon ground cinnamon, ½ teaspoon ground nutmeg, and ⅛ teaspoon ground ginger, and ¼ teaspoon table salt until the mixture is well combined. Add ⅓ cup unsalted butter (cold and cubed) and using fingers, fork, or pastry cutter, mix butter into oat mixture until evenly distributed and the crisp topping is crumbly.
Pour the peaches into the prepared pan. Sprinkle the crumble topping evenly over the peach mixture.
Bake for 45 minutes, or until the crisp topping is browned and the peach mixture is bubbly.
Let the crisp cool for 10-20 minutes to continue to thicken. Then serve semi-warm with a scoop of ice cream or whipped cream as desired.
Video
Notes
For Fresh Peaches: Select peaches that are ripe, yet firm. Remove the peel and pit, and then slice into thick ½-inch wedges.For Frozen Peaches: Defrost frozen peach slices in the refrigerator overnight. Be sure to drain the excess liquid from the peaches before making the crisp.For Canned Peaches: Select peaches canned in fruit juice rather than heavy syrup, and drain well before proceeding with the recipe.Oats: Old-fashioned rolled oats create a thick, chewy, hearty crisp, but quick oats can be used if that is all you have on hand. The topping will be slightly less chewy.Flour: Use gluten-free, all-purpose, or whole white wheat flour. Lemon: You will need 1 small lemon, zest and juice. The measurements for zest and juice do not need to be exact here.Double the Recipe: Double the ingredients and use a 4-quart or 9x13 baking dish to bake the peach crisp. The baking time will remain the same. To Peel Fresh Peaches:
Score the skin of the peach slightly with a knife.
Bring a large pot of water to a rapid boil. Place peaches in a large pot of boiling water for 15-20 seconds, or until the skin begins to split.
Remove the peaches from the boiling water with a slotted spoon and place them in an ice bath.
Use a paring knife to peel the skin, which should easily peel off the flesh of the peach.