Pattypan Squash, aka Custard Marrow Squash, Scalloped Squash, and Sunburst Squash, is a small round summer squash that comes in yellow and green colors. They have a mild-vegetal flavor and can be grilled, braised, and roasted for Ratatouille, Risotto, soup, stew, stir-fry, Tempura, and a vegetable side dish.