Combine all ingredients and mix well.
Shape meatballs into 1 tablespoon-sized portions.
Brown meatballs in a pan with olive oil over medium heat until all sides are browned.
Remove from pan and set aside.
After meatballs are removed from pan, melt butter over medium heat (do not wash pan).
Sprinkle flour over melted butter and allow to brown for about one minute.
Add in beef broth in small additions, allowing it to come to a simmer each time.
Stir in sour cream and heavy cream slowly.
When gravy has come to a simmer, add in meatballs and simmer in the gravy for about 10 minutes.
Stir in cornstarch slurry as needed to thicken.
Salt and pepper to taste.
Serve with noodles, mashed potatoes, or over rice. Be sure to include a scoop of that delicious lingonberry jam! Garnish with freshly chopped parsley.