Ina Garten Chicken Tetrazzini is one of the best and easiest Traditional Italian Tetrazzini recipes ever. This easy, creamy Chicken Tetrazzini recipe is made with linguini pasta, cooked chicken (you can use leftovers too), unsalted butter, cream of chicken soup, sour cream, and cheese.This Old Fashioned Baked Chicken Tetrazzini can be made a day in advance for later baking. Also, this Chicken Tetrazzini can be frozen, whether cooked or uncooked, for about 2 months. If you're cooking for a…