From Shauna:

Bag Meal: Rice Casserole

1 can Cream of Mushroom (or Chicken) Soup
1 cup Long Grain Rice
1 can roast beef (or ground beef, any meat will do)
2 Tb dried onion

Add fresh:
1 cup diced celery
3 Tb margarine
4 cup water

Directions:
Rehydrate onion in water. Simmer celery and onion in margarine until tender. Add soup, water and rice. Mix well. Cook over medium heat for 15 minutes. Stir in meat. Pour in greased casserole dish. Bake uncovered at 350 for 45 minutes.