Combine egg, ground beef, bread crumbs, Worcestershire sauce, salt, and pepper in a large bowl. Mix well (I just used my hands). Shape into 14 2-inch meatballs.
Heat canola oil in large skillet over medium heat. Add meatballs and brown on all sides. Reduce heat to low. Continue to cook for 10 minutes. Remove from skillet.
For sauce, add mushrooms and onions to skillet. Cook and stir 4 minutes. Remove skillet from heat.
With skillet still off stove, stir flour and ketchup into it until well blended. Slowly stir in broth. Add soup mix. Return to heat and bring to boil over medium heat. Reduce heat to low. Simmer 2 minutes.
Return meatballs to skillet. Heat thoroughly, stirring occasionally.
Stir in sour cream. Heat through, but do not bring to a boil. Serve over noodles and garnish with parsley.
Recipe by Simple, Sweet & Savory at https://www.simplesweetsavory.com/meatball-stroganoff/