Heartwarming Apple Crumble Recipe

Ingredients

• 1 cup all-purpose flour
• 3/4 cup rolled oats
• 1/2 cup packed light brown sugar
• 1/2 teaspoon ground cinnamon
• 1/4 teaspoon salt
• 8 tablespoons (1 stick) unsalted butter, chilled and cut into small pieces
• unsalted butter, at room temperature, for greasing the pan
• 6 firm tart apples (such as Cortland), peeled, cored, and cut into 1/4-inch thick slices
• 1 lemon, juiced
• 1/2 cup granulated sugar
• 2 tablespoons all-purpose flour
• 1/4 teaspoon ground cinnamon