This recipe is so simple, but so tasty. I don't have any amounts written down, because I've never actually measured it when I've made it. The basic premise is here, so do what you want for proportions. It will be good no matter what.
Ripe tomatoes (Roma tomatoes are good)
Yellow onion
Jalepeno pepper
Cilantro
Fresh lime juice
Salt
* Cut tomatoes in half and remove seeds. Dice 'em up and put in medium bowl.
* Dice onion, jalepeno, and cilantro. Add to tomatoes.
Mix with salt and lime juice to taste.
* Eat with chips or on your morning eggs.