I make this all the time and we love it. I don't usually bother with the green onions and I never use the tortilla chips. I also usually substitute enchilada sauce instead of the salsa, or mix it 1/2 & 1/2. Straight salsa is a big chunky for my taste.
We had this for dinner tonight and it was really good! Froze well too. One of my problems with freezing is that I'm always afraid that it's going to taste like it has been frozen and this doesn't at all. I made this pretty much as directed except I used a mexican blend cheese and left the green onions off but only because I don't like onions. Oh yeah, didn't use the tortilla chips either because I forgot to get them at the store. Very very good though...will make again!