Give those fried onions the day off and try this fresh green bean casserole with potato chip topping instead. This green bean casserole recipe is perfect for serving at a holiday dinner when the oven is cramped since it simmers in your slow cooker.
In a 6-quart slow cooker stir together beans, cheese, soup, red pepper, water chestnuts, milk, and mustard.
Cover and cook on low for 5 to 6 hours or on high for 2 1/2 to 3 hours. Sprinkle with potato chips before serving.