This week marks 100 years since an unimaginable disaster struck in Boston, when millions of gallons of molasses burst out of a giant, rickety tank by the harbor and gushed into the North End.

Slice them just before you make the salad. Sumac, available in Middle Eastern grocery shops, adds tartness, as would a spoonful of pomegranate molasses. To serve, toss with chopped celery and mint ...