Preheat your oven to 350°F.
If you're using fresh or frozen green beans, bring them to a quick boil until they're just tender but still crisp.
In a casserole dish, combine the green beans with the cream of mushroom soup, milk, soy sauce, black pepper, seasoning salt, and 1 cup of the crispy fried onions. If you’re adding cheese, mix it in as well.
Place the casserole dish in the oven, uncovered, and bake for 30 to 35 minutes, or until the mixture is bubbly and heated through.
Take the dish out of the oven and give it a good stir. Sprinkle the remaining crispy onions evenly over the top, then return the casserole to the oven. Bake for an additional 10 minutes, or until the onions turn a rich golden brown. Serve hot and enjoy!