In a bowl whisk together all other ingredients (EXCEPT the sour cream) and cook with your frozen or cooked homemade meatballs until tender.
At the end whisk about 1/2 c. of the hot sauce out of your pot with your sour cream to warm it a bit. Gently fold this into your sauce and meatball mixture, re-cover and let warm.. If you want to thin sauce out add 1/2 c more broth. Serve over egg noodles.