01 - Preheat the oven to 350°F (180°C).
02 - Place the barley rusks on a baking tray. Lightly sprinkle each rusk with a little water to slightly soften the surface.
03 - Bake the rusks for 7–10 minutes, or until crisp and lightly toasted throughout.
04 - Remove the rusks from the oven. While still warm, drizzle approximately 1 tablespoon of extra virgin olive oil over each rusk, allowing it to soak in.
05 - Top each rusk evenly with the finely diced tomatoes and a sprinkle of chopped red onion.
06 - Crumble feta cheese generously over the tomato and onion layer on each rusk.
07 - Sprinkle with dried oregano and freshly ground black pepper. Add a touch of sea salt if desired, keeping in mind the feta is already salty.
08 - Drizzle any remaining olive oil on top. Garnish with sliced Kalamata olives and fresh basil or parsley leaves if using. Serve immediately for the best texture contrast.