- Preheat oven to 350 degrees.
- In a 9-inch casserole dish, mix together the green beans, cream of mushroom soup, half the box of fried onions, and the shredded cheese.
- Bake in oven for 30 minutes. The mixture should be hot throughout.
- Remove from oven, top with remaining half box of fried onions, and return to oven for 5 minutes, until the onion on top is a starting to brown.
- Let cool and serve.