Preheat oven to 350 F / 180C
Cut top off peppers, placing tops to side (dice them for future use). Remove seeds, membranes (the white pieces) and discard.
Bring pot of water to boil and place each pepper in pot for 5 minutes to blanche. Remove and strain upside down to remove excess water.
In skillet, brown mince beef and Italian sausage. Drain fat and add garlic, onion, & diced pepper tops. Cook until transparent.
Stir in tomatoes with juice/water, Worcestershire, Italian seasoning, and rice. Mix until combined.
Bring to simmer, reduce heat and cover. Cook for 15-20 minutes or until rice is cooked.
Stir in 1/2 cup marinara sauce to rice/meat mixture.
Place 1 1/2 cups marinara into bottom of baking pan. Fill each pepper with filling, place into baking sheet and spoon remaining marinara over top.
Cover and bake for 35 minutes. Remove foil at 35 minute mark, top with cheddar and return to oven for 10 minutes or until cheese is melted. Cool before serving.
Enjoy!