Melt 2 Tbsp. butter in a 10 inch oven-proof skillet. Add the apples, lemon juice, vanilla, 1 tsp. cinnamon, nutmeg, 1/2 cup brown sugar and the cornstarch; stir to combine. Bake for 20 minutes.
While the apples are baking, make the pinwheels. In a large mixing bowl, combine both boxes of cinnamon roll mix with 6 Tbsp. oil, 4 eggs, and 4 Tbsp. milk. Dump the mixture onto a clean work surface and knead until smooth. Divide the mixture into 2 equal portions and roll each portion into a rectangle about 8 x 12 inches.
In a small mixing bowl combine 1/2 cup brown sugar, 4 tsp. cinnamon, and 2 Tbsp. of softened butter with a fork. Sprinkle the mixture evenly over the top of the two portions of rolled out dough.
Roll each dough tightly from the long side. Brush one end of the dough with some water and seal the log closed by pinching. Cut the logs into 1 inch slices and place on top of the apples (after they have baked for 20 minutes).
Combine the powdered sugar with 2 tsp. of milk and drizzle over the top of the cinnamon rolls. Serve warm.
Recipe courtesy of Carol Kicinski, Simply Gluten-Free