Yesterday I cooked up some black beans without knowing exactly what I planned to do with them. I mixed them with a drained can of corn (you could use fresh or frozen), some diced roasted red peppers and some minced garlic.
The dressing consists of 3 TBSP of olive oil, 1 TBSP red wine vinegar, 2 TBSP lemon juice, some oregano and basil, salt and pepper. Add to the above mixture. Let it sit for several hours in the refrigerator. That's it! It's delicious.
Optional additions are diced tomato, sliced olives, thinly sliced red onion.