Preheat the oven to 350 degrees F.
Sprinkle 3/4 cup (half) of each cheese over the bottom of a 9×9 or 11×7 baking dish. (There is no need to grease the dish.) Beat or whisk the eggs in a small bowl, and then thoroughly mix in the salsa.
Drizzle the egg/salsa mixture evenly over cheese. Layer the remaining cheese on top.
Bake for approximately 25 minutes or until the mixture is just set in the middle and the edges are a little crispy. Cool for 5-10 minutes. Cut in small squares and serve on tortilla chips. Gently reheat leftovers in the oven or toaster oven, if desired.