Ingredients:

  • 6 cups (900g) fresh peaches, peeled and sliced
  • 1/4 cup (50g) granulated sugar
  • 1 tbsp (8g) cornstarch
  • 1 tsp (2g) ground cinnamon
  • 1 tbsp (15ml) lemon juice
  • 1 cup (90g) old-fashioned rolled oats
  • 1 cup (125g) all-purpose flour
  • 1 cup (200g) packed brown sugar
  • 1/2 tsp (3g) salt
  • 1/2 cup (115g) unsalted butter, chilled and cubed

Instructions:

  1. Preheat your oven to 375°F (190°C).
  2. In a large bowl, toss the sliced peaches with granulated sugar, cornstarch, cinnamon, and lemon juice. Stir gently until the fruit is evenly coated in a cloudy glaze.
  3. Pour the peach mixture into a 9x9 inch square pan or a 10-inch cast-iron skillet, spreading it into an even layer.
  4. In a medium bowl, whisk together the oats, flour, brown sugar, and salt.
  5. Add the chilled, cubed butter. Using a pastry blender or your fingers, work the butter into the dry ingredients until the mixture looks like coarse crumbs (roughly the size of peas).
  6. Sprinkle the oat mixture evenly over the peaches, pressing down very lightly just to ensure contact.
  7. Bake for 30 minutes until the filling bubbles vigorously around the edges and the topping turns a deep, mahogany gold.