I've been making a similar (not so Swedish) version for years from a family recipe using beef and pork. I substituted the meat with ground turkey to lower the fat and cholesterol. Now I lower the fat even more, using plain yogurt instead of sour cream. I don't add milk, nutmeg or sugar. Since turkey has less flavor than beef and pork, I try to spice it up with salt, pepper, herbs (like basil and tarragon), a little Worcestershire sauce, garlic powder, and finely diced sweet peppers. It can be baked in a 350°F oven for a half-hour or so too.