Preheat the oven to 350°F.
To cook the green beans, bring a pot of water to a boil. Once boiling, add the cut green beans and cook for 6-7 minutes. Drain.
Add the soup, milk, soy sauce, pepper, cooked beans, 2/3 c of the onions and most the bacon (save a bit to add at the end) to a 1 1/2-quart casserole (8×10 pan) and stir.
Bake uncovered for 25 minutes or until hot and bubbling.
Give the mixture a stir and the sprinkle the rest of the onions and bacon pieces evenly over the top.
Bake for another 5 minutes until the onions are a golden brown.