1. Preheat oven to 350° F.
2. Sauté onions and mushrooms in butter 3-5 minutes.
3. Bring chicken broth to a boil. Cook beans 10 minutes and drain.
4. Mix together beans, onion mixture, soup, ½ of onion rings, and seasoning.
5. Pour into a 1½ quart baking dish.
6. Cover and bake 20 minutes, top with cheddar and remaining onion rings.
7. Bake uncovered10 minutes, or until casserole is heated through and cheese is melted
Tip: For additional crunch, add slivered almonds.