Shred the Rotisserie Chicken or Leftover Turkey, and then stick it back in the fridge until you're ready to mix it into the spaghetti.
In a or another large pan, sauté the onions and celery in melted butter over medium heat until they become tender.
Add the mushrooms and continue to sauté until the mushrooms have shrunken in size and softened.
Pour in the white cooking wine and allow it to simmer for about 4-5 minutes. Remove the skillet from the heat and set aside.
Bring the chicken stock to a boil in a large pot boil and add the cans of condensed cream of Chicken and cream of celery soups. Stir the mixture to break up the condensed soup and bring the mixture back to a boil.
Break the spaghetti noodles in half and add them to the soup mixture, frequently stirring while the pasta boils; about 10 minutes or until the pasta has softened.
Add the sautéd veggies, sliced olives, parsley, salt, pepper, and Chicken into the stockpot. Give it a good stir to ensure even distribution and that all ingredients are thoroughly combined.
Pour the chicken spaghetti mixture into a well-buttered , top it with shredded cheddar cheese and bake it for 40 minutes at 350°f.
Once the 40 minutes is up, turn the broiler on to 550°f to brown parts of the cheese topping. This step is completely optional but only takes about 3 minutes and adds a nice color to the cheese.
Serve topped with Crushed Red Pepper for an added spice.