Give each barley rusk a dip in water. Do not submerge for too long as you don't want them soggy, just a little moist. Set on individual plates or one big serving plate.
Drizzle each rusk with olive oil and rub the surface with half a tomato. Repeat for each rusk.
Sprinkle on chopped tomatoes, olives, capers and onions.
Top with feta, oregano, fresh herbs and another drizzle of olive oil. Serve.