You have made homemade salsa, but have discovered – after you have made it, of course – that it is far too hot and spicy for everyone’s taste! Sometimes your hot peppers are hotter than you expected, or maybe you forgot and included the ribs of jalapeno when you normally remove them first before adding to your salsa. Instead of throwing it out and starting over, instead grab a few fresh tomatoes and dice them up and add them to the salsa.
If it starts to look too much like just chopped tomatoes, add a bit of diced green peppers and/or onions and/or cilantro, but avoiding anything that could give it any kind of a kick.
Also, dairy does dilute the hotness, so if you are making it as a layered dip, using less salsa and adding extra cheese or sour cream can help it from being too hot.
In the future when you make salsa, always start it on the milder side, because it is quite easy to add a bit more jalapeno or other hot peppers into the salsa than it is to take it out.