Spray countertop lightly with non-stick cooking spray. Combine 8 rolls and roll into a 10 x 14-inch rectangle. Cover with plastic wrap and let rest.

Brown ground beef and onions and drain well. Add sloppy Joe sauce and let simmer for a few minutes.

Remove plastic wrap from dough and place the dough in the bottom of a sprayed 9 x 13-inch baking pan. Poke dough several times with a fork to prevent bubbles from forming and pre-bake at 350 degrees Fahrenheit for 15 minutes.

While crust is baking, combine remaining 6 rolls and roll into a 10 x 14-inch rectangle for the top crust. Cover and let rest.

Sprinkle 2 cups grated cheese over baked crust. Spread meat mixture evenly over cheese. Top with remaining 2 cups cheese.

Remove plastic wrap from the top crust and place it over the cheese. Cut slits at regular intervals in the top crust. Sprinkle lightly with chili powder.

Bake at 350 degrees Fahrenheit for 20 minutes or until meat mixture is bubbly and top crust is golden.