These pretty little patty pan squash are stuffed with a tasty rice, spinach, and parmesan cheese mixture. It's an eye-catching way to serve the small summer squash. Patty pan squash is also known as custard squash, scallop squash, sunburst squash, or "That little squash shaped like a flying saucer. " The patty pan is a summer squash with an edible peel, making them easy to use in many ways, from steaming to roasting to grilling. You usually want to use patty pan squash while they are still young and tender, or about 3 inches in diameter. This recipe actually works better, though, with squash a little larger in size. The boiling and baking turns them tender. Feel free to use brown rice in the stuffing, just be sure to increase the cooking time according to the package directions. Once you master this technique, you might try using it with small zucchini or yellow squash.