Add the cornstarch mixture to the pan and stir quickly. It will immediately thicken up and begin to bubble. Once you see it thicken up, turn the heat to low. Add the cheese and stir until it melts completely.
Serve with homemade baked tortilla chips. To cook, preheat oven to 400 degrees. Cut corn tortillas in 1/4′s and place onto a sheet of parchment paper. Spray with cooking spray and sprinkle with salt. Cook for 10-15 minutes until crispy.