Peppers are so great for stuffing. You can stuff them with anything you like really. From all sorts of meats, grains, cheeses and other veggies! In the recipe below we make a stuffing using only 5 simple ingredients. I like to use ready made marina but you can always use regular tomato sauce if you like.
We start of by first sautéing onions and garlic to build flavor. Then we add in ground beef and drain off any of the excess grease. From there we add in cooked rice and mix in marinara sauce. This slightly simmers for a few minutes to bring everything together. This mixture is then used to stuff the peppers topped with mozzarella cheese then into the slow cooker it goes.