Preheat oven to 350 degrees.
In a 2 qt. casserole dish combine soup, milk, salt, pepper, garlic powder, and onion powder and stir together.
Once ingredients are completely incorporated, add drained green beans until well mixed and then add half the container of french fried onions and mix together completely.
Put into the oven and cook for 30 minutes.
Take casserole out of the oven and sprinkle the remaining french fried onions on top.
Place back in the oven and cook for 4-5 minutes or until french fried onions look really golden brown.
Remove from the oven and let sit for 5 minutes before serving.
