• Preheat the oven to 350 degrees.

• Combine the flour, brown sugar, cinnamon, and salt in a medium sized bowl.
• Dice up the butter and add it into the mixture. Use two forks or a pastry cutter to cut the butter into the mixture until it resembles coarse crumbs. Fold in the oats. Set aside in the fridge till needed.

For the Apple Filling:

• Place the apples in a large bowl and toss them with the flour, sugar, cinnamon and lemon juice. Fold till they are coated well.
• Pour the apples into a greased 9x9in pan or other pan with a similar size (about 2.5 quarts)
• Sprinkle the crumble mixture evenly over the apples.
• Bake in the preheated oven for 35-45 minutes until the apples are bubbling, and the topping is golden brown and crisp.
• Allow to cool for a few minutes then serve warm with ice cream or whipped cream.