The trick to making authentic Swedish meatballs is to bead the ground meat with water until fluffly and smooth. Serve them as an hors d'oeuvre or as a main course accompanied by mashed potatos and cranberry sauce.
Start by melting the 1TBS in a small heavy skillet the butter and then add the onions and cook stirring until soft about 1 - 2 minutes.
Set the onions aside.
In your stand mixer combine the bread crumbs and water. Let them stand for a few minutes till softened.
Add in the ground beef, pork salt, black pepper nutmeg, and allspice.
Beat on low speed until smooth. Then turn to high and beat until it is light in color and fluffy approximately minutes.
Then using a scoop shape into 2" balls. Keep your hands wet to prevent sticking. As the balls are formed place them on parchment paper.
In a large skillet over medium heat melt the 1/4 cup butter . Cook the meatballs until brown in small batches and transfer to paper Towels to drain before transferring to a platter.
Once the meat balls are all cooked the same frying pan reduce the heat to medium and add the flour. cook until lightly brown. then slowly add the 2 cups of beef broth cook while stirring until a smooth gravy is formed.