-6-7 Granny Smith apples, peeled and sliced to medium thickness (not too thin so it isn't mushy, but not too thick where they are difficult to eat)
-1 tablespoon fresh squeezed orange juice
-1 tablespoon fresh squeezed lemon juice
-1/2 cup white sugar
-2 teaspoons ground cinnamon
-1 teaspoon ground nutmeg
-1 1/2 cups flour
-3/4 cup white sugar
-3/4 cup brown sugar (light or dark is fine)
-1/2 teaspoon kosher salt
-1 cup oatmeal
-2 sticks butter, diced
1. Heat oven to 350. Butter a 9x9 baking dish. You can use larger too, but I like mine thick and a thick crumble. You can also use a 9x13 rectangle dish or a 9x14 oval dish.
2. Combine the apple slices, juices, sugar, and spices. If mixture looks too dry, add a tablespoon of water. Pour into the baking dish.
3. Combine all the topping ingredients in an electric mixer with the paddle attachment. Mix on low until it is crumbly and the butter is the size of peas. Scatter topping over apples.
4. Place on a baking sheet and bake for 1 hour. Serve warm with ice cream.
Source: Ina Garten