Make vegetable soup for lunch. You can use bouillon or beef broth for the base and invite the children to each bring in a vegetable. Make a list and let each child bring in one thing to contribute. Your list could include a carrot, a potato, a tomato, frozen corn, a sweet potato, and onion, etc. Let the children volunteer to bring in one, and mark down who's bringing what so you don't end up with all carrots! We do this every year and the kids love it! We usually use a story like Stone Soup or Growing Vegetable Soup with it.
ECE teacher, mother of 3, grandmother of a whole bunch