Step 1

Prepare the peppers. Wash them, cut off the tops, and scoop out the seeds. Set aside.

Step 2

Make the filling. Combine the ground sirloin, instant rice, finely chopped onion, garlic salt, Italian seasoning, ground black pepper, and about 1/3 cup of the spaghetti sauce in a large mixing bowl. Knead until well-mixed.

Step 3

Form meat mixture into one large meatball for each pepper. Drop meatballs into peppers.

Step 4

Pour half the sauce into bottom of slow cooker. Lay peppers on sauce. Spoon remaining sauce on each pepper.

Step 5

Place lid on slow cooker. Cook 6-7 hours on low or 3-4 hours on high. Serve with rice or pasta and sauce.