Sauté the onions and mushrooms in the vegetable oil. Season with the salt and pepper
Heat the almond milk in a saucepan and add the bouillon, stirring until it dissolves. Do not allow to boil. Mix the cornstarch and water together and add to the pan, stirring well
Quickly add the green beans, the sautéed vegetables, and about half the fried onions and stir well
Pour into a casserole dish and top with the remaining fried onions. Bake for about 15 minutes, or until the onions on top begin to brown