Shred a rotessire chicken and set aside. Use carcass to make a quick stock.
Soften corn tortillas (preferably el Milagro white corn) in hot oil and set aside.
Lightly grease a Cas's dish. Roll chicken in tortillas and place in dish seam side down.
SC sauce is just a bechamel fortified with cheese and sour cream. Makes 2 cups or about 6 enchiladas. Scale as needed
1 tablespoon unsalted butter 1 tablespoon all-purpose flour 1 cup chicken stock 1/2 c plain jack cheese, grated cup sour cream - room temp
Make a roux the add in stock slowly while whisking. Turn down heat and slowly whisk in jack. Once jack is melted, remove from heat and whisk in sour cream. Season with salt and (preferably white) pepper
Pour over enchiladas, top with more jack and pop in 450 oven until lightly browned.
These are too bland for me so I'd make the Suiza enchiladas instead or mix the chicken filling with a tomatillo sauce and dump a healthy amount of hatch chile into the sour cream sauce.