In my youth, I recall that there were two types of relish for our summer cookouts - a green one for hot dogs and a red one for hamburgers, and each was perfectly suited to its task - make its subject taste its very best. I loved the sweet, simple mustardy taste of hot dog relish with its cucumber crunch ... on hot dogs; and, I adored the complex flavors of hamburger relish comprised of red and green peppers, onion, cucumber, tomatoes, and unusual spices, it complemented the beef so well. I…