01 -
Preheat the oven to 175°C (350°F) and lightly grease a 23x33 cm baking dish.
02 -
In a large mixing bowl, gently combine sliced peaches with lemon juice, cornstarch, granulated sugar, cinnamon, nutmeg, and salt until evenly coated. Transfer the mixture to the prepared baking dish, spreading it out in an even layer.
03 -
In a separate bowl, whisk together flour, oats, brown sugar, chopped pecans, baking powder, and baking soda until thoroughly combined.
04 -
Cut cold butter into the dry ingredients using a pastry blender or fingertips until the mixture achieves a coarse, pebble-like texture with pea-sized crumbs.
05 -
Gently mix in vanilla extract and lightly beaten egg until just combined. Avoid overmixing to maintain a tender, crumbly topping.
06 -
Evenly spoon the crumble topping over the peach filling in the baking dish. Bake for 40-45 minutes, or until the topping is golden brown and the fruit filling is actively bubbling.
07 -
Allow the baked dessert to cool for a minimum of 15 minutes to set the filling before serving. Enjoy warm, optionally garnished with a scoop of vanilla ice cream.