Pattypan squash, also known as scallop squash, is a small, round vegetable with a unique shape that resembles a miniature flying saucer. Its unique appearance makes it a popular ingredient in various cuisines around the world. If you're not able to find pattypan squash in your local market or grocery store, there are other names that you can use to refer to this vegetable. Some of the common synonyms for pattypan squash include sunburst squash, custard squash, and button squash. These names are commonly used interchangeably with pattypan squash, so if you see them on a menu or recipe, know that they are likely referring to the same vegetable.