These familiar round, red radishes belong to the Red Globe variety. They should be plump, firm, smooth, and free of cracks and blemishes. Smaller radishes are usually sweeter; larger ones can be sharper and more peppery.
This dish is much healthier than its casserole counterpart. The Gorgonzola's rich, creamy texture offers a nice counterpoint to the crunchy, selenium-packed nuts. Briefly steaming the beans rather than boiling retains their vitamin C and B6 content.