Preheat the oven to 375°F (190°C). Peel, core, and thinly slice the apples using a peeler and knife. Place the sliced apples in a mixing bowl, then add lemon juice, sugar, and cinnamon, tossing until evenly coated.
4 medium apples, 0.5 cup granulated sugar, 1 teaspoon ground cinnamon, 1 tablespoon lemon juice
Spread the apple slices evenly in a buttered baking dish, creating an even layer. Arrange the slices so they are flat and snug against each other, ready to bake.
4 medium apples
To prepare the crumble topping, combine rolled oats, flour, and salt in a mixing bowl. Dice the cold butter into small pieces and add to the dry mixture. Using a pastry cutter or fingertips, rub the butter into the mixture until it resembles coarse crumbs.
1 cup rolled oats, 1/2 cup all-purpose flour, 1/2 cup unsalted butter, Pinch salt
Sprinkle the crumble mixture evenly over the apples, covering the surface completely. Press gently to ensure it stays in place and forms an even layer.
1 cup rolled oats, 1/2 cup all-purpose flour, 1/2 cup unsalted butter, Pinch salt
Place the baking dish in the preheated oven and bake for about 40 minutes, or until the topping is golden brown and the apple filling is bubbling around the edges. Listen for the crackling sound indicating doneness and smell the sweet cinnamon aroma.
Remove from the oven and let cool slightly before serving. Serve warm with a scoop of vanilla ice cream or a dollop of whipped cream if desired.
