In a bowl, combine the ground beef, bread crumbs, parsley, seasonings and egg. If the meat seems too wet yet you can add a little more bread crumbs.
Roll into 16 to 20 meatballs. I like to take the entire loaf of meat, divide into two, divide each again into two, and then take each quarter and roll that into a sausage shaped roll - this makes it easy to cut into 4-5 pieces you can roll into meatballs.
In a large skillet heat the oil and 1 Tbsp of butter.
Cook the meatballs, turning them to brown them on all sides. Unless you have a very large skillet it will probably be best to do half of the meatballs at a time.
Remove the meatballs and cover with foil to keep them warm, or put them into a 200 degree F oven.
Add 4 Tbsp of butter to the skillet to melt.
Add the flour and whisk until the roux is tan to brown.
Add the beef broth and heavy cream.
Add the Worcestershire Sauce and Dijon.
Stir and simmer until it thickens.
Add the meatballs back and stir through the sauce until heated through.
Serve the meatballs and gravy over egg noodles. Garnish with dill or parsley.