Dice up the vegetables- I usually use a small red onion as I don't like it to overpower the salad. You can adjust the vegetables to your tastes.
Place the vegetables in a bowl along with the olives and feta cheese.
Mix olive oil, red wine vinegar, lemon juice, garlic, oregano, salt and pepper and pour over the vegetables.
Usually I let everything sit and marinate in the fridge for approximately 1/2 an hour. This seems to marry the flavours! I like to serve it in a clear serving bowl as the colours are so fresh and appealing.