Okay, here is my most excellent salsa recipe:
1 can chopped tomatoes (not sure how many fresh ones, maybe 2 or 3?)
2 serrano peppers
1/4 green pepper
1 TBS lemon juice
1 TBS lime juice (or juice from 1/2 lime)
1 garlic clove
oregano (I know, weird. But it's good)
I dump the tomatoes in the blender, chop everything else and then mix in blender. Then I taste it to see what it needs.
I usually just sprinkle a bunch of oregano in, I sometimes put in green onions, too. Just taste it, usually it's either not hot enough (another jalepeno) or it needs more salt. If you take a whiff and you start coughing - it's hot enough!
Anyway, play around with it until it's how you like it. Just like how much cilantro you put in, it's personal taste! :) Ha ha.