Brown the ground beef in a skillet on the stove top. Drain.
Add the beef, cut up bell pepper tops, rice, 1 cup of the marinara sauce, onion, salt, garlic powder, thyme and oregano to a medium sized bowl. Stir.
Stuff the peppers with the filling you just made. If there is any leftover filling add it to the bottom of the slow cooker.
Add remaining marinara sauce to the slow cooker.
Add the stuffed peppers in the slow cooker. I try not to let them rest on the sides of the slow cooker, but most of the time they end up falling over later.
Cover and cook on LOW for 5 hours without opening the lid during the cooking time.
Video
Notes
Tempted to use raw meat instead of browning? Raw meat in stuffed peppers does work well, but the texture will be more like a meatloaf than a crumbly filling.
Add any remaining peppers to an airtight container or tupperware dish and keep them in the fridge for up to 4 days. You can reheat them in the oven or microwave until warm throughout.
Variations
If you’re going for a veggie option, swap the beef for soy crumbles or a can of pinto beans. You can also toss in extra veggies like chopped squash or asparagus to the rice mix.
Salsa works great as a replacement for marinara sauce, and you can use Italian seasoning instead of thyme and oregano for a different flavor.
Prefer something other than ground beef? Try ground chicken, turkey, pork, or Italian sausage instead.
Stuffed peppers usually come with cheese, but it’s totally optional. If you want some cheesy goodness, sprinkle about 2 tablespoons of shredded mozzarella on each pepper about 10 minutes before they’re done cooking.
Serving Suggestions:
These can certainly be considered a full meal in one pepper, but you can serve with a green salad and garlic bread!
When it comes to toppings, you can try a variety of ideas such as a dollop of sour cream, diced tomatoes, salsa, bacon bits, or cheddar cheeese.