Black bean salad HELPP!?

-Black beans

onion

tomato

cilantro

corn

salt

pepper

olive oil

does this sound about right??I think some sort of acidic ingredient would work well, lemon or lime juice? even white vinegar, also you might want to add a tbs or so of white sugar to the wet mix.I like this one. http://goodsdetail.info/422224/cilantro
Yes. Add some lime or lemon juice.