Another easy one that hasn't been posted is the green bean salad. Just blanch some green beans. Chop them roughly.
Add some cherry tomatoes and dress with balsamic vinegar, salt, pepper and olive.
You can also add shallots/red onions, a tiny bit of garlic, parsley, char grilled capsicum, tuna, walnuts and/or capers if you fancy any of them.

I love the thai noodle and chicken salads with lime, fish sauce, sugar, mint, coriander, shallots and peanuts.