6medium applespeeled and sliced (about 1.5 lbs / 700g)
2tablespoonslemon juice
½cup100g granulated sugar
½cup100g brown sugar
1teaspoonground cinnamon
¼teaspoonnutmegoptional
1cup90g rolled oats
¾cup95g all-purpose flour
½cup115g unsalted butter, cold and cubed
¼cup30g chopped nuts (optional, walnuts or pecans)
¼teaspoonsalt
Instructions
Preheat the oven to 350°F (175°C) and lightly grease a 9×13-inch baking dish.Peel, core, and slice the apples evenly.In a large bowl, toss the apples with lemon juice, granulated sugar, cinnamon, and nutmeg until well coated.Spread the apple mixture evenly in the prepared baking dish.In a separate bowl, combine rolled oats, flour, brown sugar, salt, and chopped nuts (if using).Add the cold cubed butter and rub it into the mixture using your fingers or a pastry cutter until crumbly with pea-sized clumps.Sprinkle the oat crumble topping evenly over the apples.Bake for 40–45 minutes, until the topping is golden brown and the apples are tender.If the topping browns too quickly, loosely cover with foil during the last part of baking.Remove from the oven and let cool for 10–15 minutes before serving.