Preheat oven to 350°F.
Preheat sauté pan and add ground beef. Sauté beef until it is 50% browned. Add onions and peppers to ground beef.
Once the ground beef has completely browned and onions are translucent add remaining ingredients and let simmer for 20 minutes. Stirring occasionally.
Meanwhile, toss eggplant with olive oil, salt and pepper. Sear both sides for 3 minutes per side in a hot grill pan or sauté pan.
Place eggplant on baking sheet pan and bake for 5 minutes.
Remove eggplant from oven, and let cool for 3 minutes. Assemble sloppy joes, using the eggplant slices to sandwich the meat mixture and enjoy!