1/2 cup old-fashioned rolled oats
1 cup fresh applesauce
5 cups tart baking apples (peeled, cored, and finely diced)
1 tsp ground cinnamon
2 cups all-purpose flour
1 cup granulated sugar
1 cup cold heavy whipping cream (whipped to stiff peaks)
1 tsp pure vanilla extract
1 tsp baking powder
1/2 tsp fine sea salt
5 cups toasted chopped walnuts