I'd show a photo but I ate it too quickly. There were cherry tomatoes, sweet onion (or possibly fat scallions; they have a small but definite bulb and a mild, flavorful taste), hot peppers and black olives left over from Sunday and while you can put other things in salsa (a little cilantro, for instance), that combination will do fine.
Chopped and mixed (mind the olives, which are about the only salt), it was more than fine on corn chips, which is why there aren't photos. Next time I'll make more: I suspect it would be even better after a night in the fridge.
BUILDING A 1:1 BALUN
6 months ago