Preheat oven to 350 degrees.
Cut off the tops of each bell pepper and remove the seeds/membranes from each pepper.
Cook the peppers in a large pot of boiling water for about 5 minutes (to soften).
Begin to saute the onion and olive oil in a large skillet on medium heat for about 3-5 minutes, then add the garlic.
Add the ground beef and salt and cook until meat is browned.
Once meat is cooked, add the riced broccoli or broccoli slaw and cook an additional 3-5 minutes.
In a large mixing bowl, mix the meat/brocccoli mixture with the tomatoes/sauce until combined. (Crush any large tomatoes. Taste and add more salt/garlic if needed.)
Stuff each pepper with the meat mixture and place in a deep baking dish.
Cook for 30 minutes.
Garnish with fresh basil or marinara sauce.