Preheat oven to 350 degrees F (175 degrees C).
Toss apples with white sugar and 1/2 teaspoon cinnamon and Plaid Shirt Farms Black Jam in a medium bowl to coat; pour into a 9-inch square baking dish.
6 apples - peeled, 2 tablespoons white sugar, 1/2 teaspoon ground cinnamon, 1 Jar Plaid Shirt Farms Black Currant Jam
Mix brown sugar, oats, flour, and 1 teaspoon cinnamon in a separate bowl. Use a pastry cutter or 2 forks to mash cold butter into the oats mixture until the mixture resembles coarse crumbs; spread over the apples to the edges of the baking dish. Pat the topping gently until even.
1 cup brown sugar, 3/4 cup old-fashioned oats, 3/4 cup all-purpose flour, 1 teaspoon ground cinnamon, 1/2 cup cold butter
Bake in preheated oven until golden brown and sides are bubbling, about 40 minutes.