# What You Need:
→ Filling
01 - 6 medium apples (such as Granny Smith or Honeycrisp), peeled, cored, and sliced
02 - 1/3 cup granulated sugar
03 - 2 teaspoons ground cinnamon
04 - 2 tablespoons lemon juice
05 - 1 tablespoon cornstarch (optional, for thicker filling)
→ Topping
06 - 1 cup old-fashioned rolled oats
07 - 1/2 cup all-purpose flour
08 - 1/2 cup unsalted butter, melted
09 - 1/2 cup light brown sugar, packed
# Steps:
01 - Preheat the oven to 350°F.
02 - Toss the sliced apples with granulated sugar, ground cinnamon, lemon juice, and cornstarch, if using, until evenly coated.
03 - Spread the apple mixture evenly in a 10- or 12-inch oven-safe skillet.
04 - Combine the rolled oats, all-purpose flour, melted butter, and light brown sugar in a bowl until crumbly and well mixed.
05 - Sprinkle the oat mixture evenly over the apple filling in the skillet.
06 - Bake in the preheated oven for 35 minutes or until the topping is golden and the apples are bubbling.
07 - Allow to cool for at least 10 minutes before serving. Serve warm, optionally with vanilla ice cream or whipped cream.
