I always recommend serving Swedish meatballs with a base like egg noodles and lingonberry jam. You can also try Mashed Potatoes, pasta, or Rice Pilaf. That way there's something there to help you soak up all of that delicious brown gravy and not one drop goes to waste! You can also lighten up your plate with a veggie side dish like Sautéed Mushrooms or Haricots Verts. Broccoli and cauliflower are always good vegetables to soak up the sauce.