Stuffed Green Peppers with Brown Rice

Ingredients:
1 C long-grain brown rice (I used Uncle Ben’s Brown Rice, but any long-grain rice will work.
4 large green bell peppers, bottom trimmed, cap end cut off and diced, and seeds removed
1 large onion, diced
2 tsp. + 1 tsp. olive oil
2 links (about 8 ounces) turkey Sweet Italian Sausage (or other sausage of your choice. Use diced mushrooms instead of sausage for vegetarian version.)
1/2 tsp. ground fennel
1/2 tsp. dried Greek or Turkish oregano
1/2 cup grated Parmesan cheese
salt and fresh ground black pepper to taste
1/4 cup grated mozzarella cheese