For the apples
01 -
3 large firm apples, such as Honeycrisp, Fuji, or Gala
02 -
1 tablespoon lemon juice
03 -
1 teaspoon vanilla extract
04 -
1 tablespoon light brown sugar
05 -
1/4 teaspoon ground cinnamon
For the brown sugar oat topping
06 -
5 tablespoons (70 g) unsalted butter, melted, plus more for the dish
07 -
1/2 cup (50 g) old-fashioned rolled oats
08 -
1/3 cup (40 g) all-purpose flour
09 -
1/3 cup (65 g) packed light brown sugar
10 -
3/4 teaspoon ground cinnamon
11 -
1/8 teaspoon fine salt
For serving
12 -
Vanilla ice cream, whipped cream, or Greek yogurt, optional