Rocket/Lollo rosso/Lamb's lettuce/Watercress
Beef tomatoes* (must not have been in fridge; roughly sliced)
Red onion (finely sliced rings)
*sun-dried tomoatoes are an acceptable alternative/addition if you're feeling particularly frivalous.
Your peppers and cucumber can fuck right off.
Dressing: Balsamic and olive oil, no fucking around. Liberal sprinkling of coarsely ground black pepper.