10 make ahead vegetable casserole recipes. They are tasty and easy and you can make them ahead of time. Great to take as a dish to a large family gathering, when you are invited or if you have a large family at your home. Very pleasing and healthy vegetables to make sure your family is eating well. Low carb and vegetarian or vegan, improvise for your taste. I love to use cream of mushroom soup, to sharpen the taste i use cream instead of water. Enjoy.