Chicken Tetrazzini is one of my favorite go-to comfort food recipes. This easy-to-make creamy casserole is always a hit in my household and will be in yours too – I guarantee it!
Cook the noodles al dente, according to package directions. Reserve a little of the pasta cooking water for later. Preheat the oven to 350° and spray a 9×13 inch pan with cooking spray.
Melt half the butter in a large pan and cook the onions and garlic for 4 minutes. Add the salt, pepper, celery and bell pepper and cook for another 2 minutes.