Preheat oven to 400°F. Grease a 9 by 13-inch baking dish with olive oil or cooking spray.
Cut bell peppers in half and clean out the seeds and membranes. Rub olive oil on the inside of each pepper and place them in the baking dish. Sprinkle with salt and pepper.
3 bell peppers, Salt and pepper, 2 Tablespoons olive oil
Roast peppers for 15 minutes, until soft, but still under-cooked. Remove dish from the oven and set aside (leave the oven on).
Heat a large skillet over medium heat. Add the remaining olive oil and saute the onion until soft, 3 minutes or so. Add ground beef and cook until browned. Drain off any fat if necessary, but do not rinse.
2 Tablespoons olive oil, ½ medium onion, 1 pound ground beef
Stir in minced garlic and cook until fragrant, about 1 minute. Stir in tomato sauce, cauliflower rice, Italian seasoning, salt, and pepper. Sprinkle with red pepper flakes and cook for another 2 minutes or so.
1 cup prepared cauliflower rice, 1 tablespoon Italian seasoning, ¾ cup tomato sauce, 2 cloves garlic, ½ teaspoon red pepper flakes
Turn the burner heat off. Stir in half of the fontina cheese and all of the parmesan. Spoon the mixture into the peppers and top each one with the remaining fontina divided evenly.
1 cup shredded fontina cheese, ¼ cup grated parmesan cheese
Lower the oven temperature to 350°F. Bake 20-25 minutes, until cheese melts and pepper is soft and tender. The edges should start to brown.
Remove from the oven and allow to cook 5 minutes or so. Sprinkle with fresh basil or parsley if desired, then serve and enjoy!
Fresh basil or parsley