02Melt 2 tablespoons of the butter in a large skillet over moderate heat. When the foam starts to subside, add the meatballs in batches so you don't overcrowd the pan. Saute the meatballs until well-browned on all sides, about 7 minutes total. Remove the meatballs to a platter lined with paper towels as they are done.03Discard most of the fat from the skillet and return it to the heat. Add the remaining tablespoon of butter and swirl it around to coat the pan. Sprinkle in the flour, and stir with a wooden spoon to dissolve into the fat. Pour in the chicken broth, and stir with a wooden spoon to loosen the bits from the bottom of the pan. Simmer and stir until the liquid is reduced and a sauce starts to form; season with salt and pepper. Lower the heat and stir in the sour cream. Return the meatballs to the sauce and stir in 1/4 cup of the lingonberry jam until combined. Simmer until the sauce thickens slightly and the meatballs are heated through, about 15 to 20 minutes. Shower with chopped parsley and transfer to a serving bowl. Serve the Swedish meatballs with additional lingonberry jam on the side.