Green beans, shaved fennel, feta and olives tossed with toasted bread cubes tossed in a vinegary dressing for a Mediterranean style panzanella.
Preheat broiler. Place bread on a baking sheet. Broil, turning once, until bread darkens, about 4 minutes. Cut bread into 1-inch cubes; add to salad, and toss to combine. Sprinkle with sumac, if desired.