Whether you call this chicken spaghetti or whether you call it chicken tetrazzini, regardless you should call it dinner! I created this recipe to make weeknights easy but also satisfying. The spaghetti baked in the creamy savory sauce with chicken is so cheesy, creamy, and delicious, it almost doesn't make sense for it to be so easy. To make your weeknights even easier I created this recipe using a rotisserie chicken, chopped up, and added directly into the casserole. So, if you're on your…