Optional add-ins: mushrooms and extra green pepper dices.
Preheat oven to 400 degrees. Remove the sausage from the casing, brown in a skillet and break up into smaller pieces. When the sausage is cooked, add the oregano and marinara sauce and reduce heat to low. Halve the green peppers and remove the seeds and ribs. Place the peppers in a roasting pan or on a cookie sheet face up and lightly spray with extra virgin olive oil. Mix in the rice and any add-ins at this time to the sausage mixture and take the skillet off the heat. Add the cheese. Fill each pepper half with the mixture and top with more cheese. Cover with foil and place in the oven. Bake for 30-60 minutes; depending on how done you want your green peppers. Serve with extra marinara sauce and a mixed salad.