Preheat your oven to 350°F (175°C).
In a large mixing bowl, combine the green beans, cream of mushroom soup, milk, soy sauce, and half of the French fried onions.
Add salt and pepper to taste, mixing until well combined.
Transfer the mixture to a 2-quart casserole dish and spread it evenly.
Bake in the preheated oven for 25 minutes.
Remove the casserole from the oven, stir gently, and sprinkle the remaining French fried onions on top.
Return the casserole to the oven and bake for an additional 10-15 minutes.
Let it cool for a few minutes before serving.