Ah, the radish. Its American history has it thin-sliced and tossed among mismatched vegetables and iceberg lettuce as an inconsequential splash of color. It's time to right generations of oversight of this marvelously delicious vegetable. Radishes of all kinds can stand up to fairly aggressive dry-heat cooking methods like pan roasting, as they contain plenty of water to help regulate their internal temperature during cooking. You will make this dish regularly, for the honor of radishes everywhere.