Chickpeas: Roughly chop cooked or canned chickpeas (you can pulse them, carefully, in a food processor) and toss with olive oil, lemon juice, lots of chopped fresh parsley and mint, and a few chopped tomatoes. Call this chickpea tabbouleh.
White Beans. Mix cooked cannellini or other white beans, chopped cherry or grape tomatoes and arugula or baby spinach. Lightly toast sliced garlic in olive oil with rosemary and red pepper flakes; cool slightly, add lemon zest or juice or both, then pour over beans.
Pasta. Toss cooked pasta with roasted red peppers, toasted walnuts, fresh goat cheese, basil and olive oil. Corny, but still good.
Red Peppers. Slice roasted red peppers (if you must use canned, try to find piquillos) and fresh mozzarella. Toss with cooked white beans, olive oil, red wine vinegar, a chopped shallot and fresh rosemary or parsley.