Slice the cherry tomatoes in half.
Peel the cucumber (if desired) and cut it into half-moons.
Thinly slice the red onion.
Slice the red and green bell peppers into strips.
Combine in a bowl:
In a large mixing bowl, combine the cherry tomatoes, cucumber, onion, bell peppers, and Kalamata olives.
Add the feta:
If you have block feta, cut it into cubes and add it to the salad. If you have crumbled feta, just sprinkle it on top.
Dress the salad:
Drizzle the olive oil and red wine vinegar (or lemon juice) over the salad.
Sprinkle the dried oregano over everything and season with salt and pepper to taste.
Toss gently:
Toss all ingredients gently to combine without breaking up the feta too much.
Garnish (optional):
Garnish with some fresh parsley or mint leaves for an extra burst of freshness.
Serve:
Serve immediately as a side dish or light meal. It’s perfect with pita bread, grilled meats, or just on its own!