These days we are used to to finding convenience foods in the supermarket - and they really help us save time. This recipe is based on a traditional South American favorite using today's shortcut ingredients.
Preheat oven to 325 degrees. In a medium saucepan, over medium-high heat, combine the apple juice, sugar, raisins, walnuts, and cornstarch. Bring the mixture to a boil, then reduce the heat to low and cook for 5 minutes or until the mixture thickens.
Meanwhile, cut each cinnamon roll into 6 pieces. Place half of the pieces on the bottom of a 13x9-inch glass baking pan that has been coated with nonstick baking spray. Cover with the raisin-nut mixture, then top with the remaining dough pieces. Bake for 30-40 minutes, or until the dough is firm and golden. (For a sweeter touch, spread the icing from the cinnamon roll packages over the top just after removing the cake from the oven.) Cool, then cut into serving-size pieces.