Preheat oven to 375ºF. In a large bowl, whisk together the flour, baking powder, cinnamon and salt. In a separate bowl, whisk together the pie filling, sugar, oil and eggs. Scrape the pie filling mixture into the flour mixture and use a rubber spatula to gently fold the wet ingredients into the dry. Divide muffin batter between 11 greased or paper-lined muffin tins. Bake for about 18 minutes. Once cooled, top muffins with whipped cream and a dusting of cinnamon. Makes 11 muffins.