I da Constanos, the mother of my friend-since-birth Jeanette Pagnoni, would often make a Friday dinner of tuna and egg salads, coleslaw and potato salad. Jeanette’s younger brother, Peter, would announce, ‘Mommy’s making egg shell salad for dinner.’ The version below meets with rave reviews whenever I make it, but I’m careful about the shells. If you want to serve some coleslaw with the