To make the meatballs, in a medium bowl, combine the breadcrumbs, ¼ tsp nutmeg, allspice, garlic powder, and salt.
Meanwhile, add the beef and pork blend and grated onions to a large bowl. Lightly whisk the egg, then add it to the bowl with the meat. Lastly, add the breadcrumb mixture.
Use your hands to mix the meat and seasonings until evenly combined, but avoid overmixing.
Evenly divide and shape the meat mixture into 16 meatballs, about 1.5 Tbsp each (1.4 oz, 40g), packing tightly.
Add the vegetable oil to a large skillet and heat over medium. Once hot, carefully add the meatballs. Cook for three minutes on each side, or until well browned. The meatballs do not need to be cooked through at this point. Remove the browned meatballs from the skillet and set aside. (My pan was large enough to cook all the meatballs at one time. Make sure not to overcrowd the pan and work in batches if necessary.)
Add the butter and the flour to the skillet. Whisk the butter and flour together as the butter melts. Cook the butter and flour mixture for about two minutes.
Slowly whisk in the beef broth, making sure to release all of the browned bits off the bottom of the skillet. Allow the broth to come up to a simmer, at which point it will thicken, 3-5 minutes.
Stir in the Worcestershire sauce, pepper, nutmeg, and heavy cream. Taste the cream sauce and adjust the salt or seasonings to your liking.
Return the meatballs to the skillet and stir to coat in the sauce. Heat the meatballs over low, stirring occasionally, until heated through, about 5 minutes.
*I kept it simple with plain breadcrumbs, but you can also use panko or Italian breadcrumbs for additional flavor. Or make your own homemade breadcrumbs!**I used the beef and pork blend because it’s so budget-friendly. You can also use 1/2 lb. ground beef and 1/2 lb. ground pork.***I like to use Better Than Bouillon to make broths to keep costs low. I used 2 tsp of bouillon and 2 cups of water.****You technically don’t have to use heavy cream to make the sauce, but it does give it that rich velvety texture and flavor. You could also use whole milk or half-and-half. Just make sure the sauce doesn’t boil, or it might curdle.