Just take the four main components of salsa: tomatoes, onion, chile peppers, and garlic. Then create your own basic or designer salsa using: hot peppers or mild ones, lots of onion or just a little; add optional ingredients like cilantro, lime juice, mango, cucumber.... A little salt is always a good idea too.
This salsa is made with a variety of heirloom tomatoes, shallots, habaƱero, cilantro, lime juice, and kosher salt. I used shallots, which have a mild onion and garlic flavor, because that's all I happened to have on hand. Lucky me – it turned out great!
By the way, avocados are also in season now, so make some guacamole too, and enjoy the best of the season!