Make sure the oven rack is in the center position and preheat the oven to 350?F.
Grease a 9 by 9-inch baking dish with 1 tablespoon of the butter. Set aside.
Place the flour, brown sugar, 1/4 cup of the granulated sugar, and the salt in a medium mixing bowl.
Add the remaining 4 tablespoons of butter pieces and work them in with two forks, a pastry blender, or your fingers until the mixture resembles coarse crumbs. Refrigerate the crumb topping while preparing the other ingredients.
Peel and core the apples. Now cut one apple in half. Place one apple half flat on the cutting board and cut lengthwise into 6 slices.
Place the slices in a large mixing bowl and use your hands or a wooden spoon to toss with the lemon juice.
Repeat with the remaining apples, tossing with lemon juice after each addition.
Add the remaining 3/4 cup of granulated sugar, the cornstarch, and the cinnamon to the apples and stir well with a large spoon.
Pour the apples into the prepared baking dish and crumble the topping evenly over the mixture.
Bake until golden brown and bubbling, about 1 hour and 15 minutes.
Using oven mitts or pot holders, remove the dish from the oven and cool on a wire rack for 10 minutes before serving.
Yield: 6 to 8 servings
Be careful coring and slicing apples! Have an adult help you. And heyσbe really careful taking the hot, bubbly crisp out of the oven.
If you want to make a pie instead, just pour the apples into an (unbaked) store-bought or premade piecrust and proceed as directed above to make an apple crumb pie!