Cook the sausage in a 12-inch skillet over medium-high heat until it's well browned, stirring often.
Add the celery, pepper, onion, thyme, marjoram, and seasoning packet from the rice blend to the skillet and cook until vegetables are tender-crisp.
Stir the sausage mixture, stock, soup, rice blend and 1/2 cheese in a 3-quart shallow baking dish. Cover the baking dish.
Bake at 375°F for 1 hour or until the rice is tender. Stir the sausage mixture before serving. Sprinkle with the remaining cheese.