This is another of my mother's terrific recipes, from when we lived near the CA/MX border. This is MY ultimate comfort food! I usually just use 1 pkg of Kraft's pre-grated 4-Cheese Mexican blend - which has asiago and queso fresco added to the usual cheddar and jack, then add some sharp cheddar. BEST if you make the sauce, the night before, and refrigerate. Makes 8-10 enchiladas, and 4 cups of sauce.