Cut tops off peppers, chop tops and set aside. Discard stems
and seeds; set pepper cups aside.
Reserve 3/4 C. spaghetti sauce, pour remaining sauce into a slow cooker.
Combine the sausage, rice, cheese, onion, tomato, olives, parsley, garlic powder, salt, Italian seasoning, red pepper flakes and reserved chopped peppers and spaghetti sauce.
Spoon into pepper cups; place in a slow cooker.
Cover and cook on low for 4-5 hours or till peppers are tender.