(Recipe doesn't call for it, but I will add mushrooms sometimes if I have them on hand)
What you do:
Cook noodles according to package. Meanwhile, combine beef, breadcrumbs, milk, salt, pepper and onion in large bowl. Form mixture into meatballs, should get approx 24. Melt margarine into large skillet, cook meatballs over med heat until no longer pink, remove from heat. Place flour in skillet, add broth. Place over medium heat 3 minutes. Remove from heat, stir in sour cream. Return meatballs to pan, cook 3 min, do not boil. Serve over noodles.