Instructions:

1. Prepare the Peppers:
   Cut off the tops and remove the seeds from the peppers. Parboil them for 5 minutes and then drain.
2. Cook the Beef and Onion:
   In a skillet, cook the ground beef and chopped onion until fully cooked. Drain any excess fat and set aside.
3. Prepare the Rice:
   Follow the package instructions to prepare the Rice-a-Roni mix. Once the rice is done, mix it with the cooked beef and onion.
4. Stuff the Peppers:
   Stuff the parboiled peppers with the rice and beef mixture, packing it tightly.
5. Make the Sauce:
   Combine the tomato sauce with 1 teaspoon of sugar and pour this around the stuffed peppers (not over them).
6. Bake the Peppers:
   Cover the baking dish and bake at 350°F (175°C) for 35 minutes. Uncover, top with shredded cheese, and bake for an additional 5 minutes to melt the cheese.
7. Serve:
   Serve the stuffed peppers with the tomato sauce from the baking dish for extra flavor.