In a blender, blend serrano chile, garlic salt, green chiles, stewed tomatoes and 1 1/2 of the tomatoes. NOTE: Start with 1/3 of the serrano chile and if you want it spicier, add a little more. DO NOT put the whole chile in at the beginning! Start mild and add as you go.
Add chopped green onions, the remaining 1 1/2 finely chopped tomatoes and the 1/4 bunch chopped cilantro.
I usually pour mine into a quart and pint mason jar. This tastes great right away but is also wonderful for days afterward after the different tastes have time to combine. Refrigerate until ready to serve then dig out the tortilla chips!
This is also great on any kind of mexican food!