
Toss diced apples with lemon juice, sugar, cinnamon, and nutmeg.
Divide apple mixture into ramekins or a small oven-safe dish.
Mix flour, oats, brown sugar, and salt together, then work in cold butter until the mixture forms coarse clumps.
Press the crumble topping evenly over the apples.
Air fry at 350°F for 16–18 minutes until the topping is deep golden and apples are tender.
Serve warm, drizzled with caramel sauce if desired.
Tip: Use a mix of tart and sweet apple varieties like Granny Smith and Honeycrisp for the best balance of flavors.
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