Mix onions, peppers, garlic powder, Italian seasoning, salt, pepper, chicken, cream of chicken soup, Campbell's Chicken Noodle Soup and 1 cup of the shredded cheese together in a crock-pot.
Cook on low for 2-3 hours.
Pour in cooked spaghetti and remaining cheese.
Toss to coat the pasta in the sauce and melt the cheese. I add a few splashes of milk or chicken stock if the sauce needs it.
Cook another 20-30 minutes on low and it is ready to serve.
Campbell's Chicken Noodle Soup is full of mouth-watering flavors your family will love and it makes this sauce taste like it has been cooking all day. It is a traditional family favorite loved by kids for generations and generations.