Thats what I had for dinner last night. I really like how all the flavours really compliment each other.
Recipe (for 2)
I Romaine lettuce
4 inches of cucumber (how do you quantify cucumber in general?!)
12 cherry tomatoes
1 small red onion
1 red pepper
olives (I prefer green, but black is more traditional)
Feta cheese (I use the pre-cubed Apetina stuff, and its pretty good)
Mix all the ingredients together after chopping/washing etc. I used french vinaigrette on mine, which is not very purist, but you could use whatever you wanted. Waitrose sell a yummy sweet balsamic and red pepper dressing which goes well with it.
I served mine with warm olive ciabatta, because I can't live without carbs. Delicious (and very easy!)