Preheat your oven to 350°F.
In a medium bowl, whisk together the condensed soup, milk beverage, soy sauce, and pepper. Add the green beans and half (⅔ cup) of the fried onions, and stir to coat.
Place the mixture in a 1½-quart casserole dish or a 9-inch round or square baking dish.
Bake the casserole for 25 minutes. Give it a quick stir, and sprinkle the remaining onions on top. Bake for another 5 minutes.
