Green Bean Casserole This cozy green bean casserole is a true Thanksgiving classic — creamy, comforting, and topped with plenty of crispy onions, just like the dish many of us grew up serving year after year. What You'll Need 6 strips bacon 1/2 yellow onion, finely diced 1 1/2 cups chopped button mushrooms 3 cloves garlic, minced 2 cans (10.5 oz each) cream of mushroom soup 1/4 cup milk 1 cup shredded Monterey Jack cheese Salt and pepper to taste 4 cans (14.5 oz each) cut green beans, drained 1