Preheat oven to 400 degrees. Spray an 8 inch baking pan with non-stick spray. Set aside

Starting at the outside edge of the apple make thin slices, cutting most of the way, but not all of the way through the apple

Please apples, core side down in the prepare baking dish.

In a small bowl combine 1 Tbls sugar, 1 Tbls butter and 1/2 tsp cinnamon. Brush evenly over the apples. Cover with foil and bake for 20 minutes.

Remove the foil and bake for an additional 10 minutes, or until apples are tender.

Remove from the oven and let stand for 10 minutes.

Meanwhile combine remaining 3 Tbls sugar 1 1/2 Tbls butter, 1/4 tsp cinnamon, oats, flour, and salt. Carefully fan open the apples, and top with oat mixture.

Return to the oven and bake for 10 minutes. Turn broiler to high, and bake for 2 minutes.

Remove from oven, and serve warm topped with ice cream.