Keto friendly chicken alfredo casserole with a side of celery

This casserole was simply delicious!! The alfredo sauce : whipping cream, grass fed butter, cream cheese, garlic powder, chopped garlic, italian seasoning, Himalayan sea salt, pepper and parmesan cheese; added to chopped onions, mushrooms, zucchini and broccoli; topped with shredded cheese ( mixture of asiago and parmesan) then baked in oven; organic celery on the side.