Prep Time 15 minutes mins
Cook Time 30 minutes mins
Total Time 45 minutes mins
Use fully cooked chicken so the casserole comes together quickly and evenly. Do not skip the short resting time after baking, because it helps the sauce settle. If the mixture looks too thick before baking, add a small splash of milk. If you want a richer flavor, mix in a little extra cheese near the end of baking.