Stuffed mussels

Cook the mussels until tender. While the clams are cooking, combine the remaining ingredients (except the marinara sauce) and mix well.
Remove the shells from the water, let them cool, then fill them with the mixture and place them in a baking dish. Cover the stuffed shells with marinara sauce and top with Parmesan and mozzarella cheese.
Bake at 350 degrees for about 40 minutes