Heat a large skillet or pan to medium-high heat. Add the butter and allow it to melt. Add in the onion and garlic and sauté until the onions begin to become slightly translucent.
Scoot the onions to one side and add the ground turkey, breaking it down into smaller pieces. Stir occasionally, combining the meat and onions.
Before the turkey is fully cooked, add in the mushrooms, Worcestershire sauce, thyme, paprika, salt, and pepper. Sauté until the mushrooms are slightly softened and the turkey is cooked through and no longer pink.
Once the turkey is cooked, add the broth and the dijon mustard to the pan and shift to medium heat. Allow to come to a light boil. Add in the pasta and press it into the broth. It is ok if the pasta is not fully covered by the broth.
Simmer the pasta about 7-9 minutes or until the egg noodles are al dente*.
When pasta is cooked al dente, shift the heat to low and stir in the cream cheese and sour cream. Stir gently until smooth and creamy. Add in spinach if desired and allow to wilt.
Top with freshly chopped parsley and serve.