For a dairy free alternative, just replace the butter with coconut oil or lard.
I also added some mayonnaise and an avocado that I sprinkled with some salt & pepper on the side.
If you want a great sauce to go with your meatballs simply add about 150 gram cream to the pan with the remaining grease after frying and taking the meatballs out.
Then, let the cream cook on medium heat while stirring until it is reduced to your desired thickness. This works great with coconut milk/cream, too.
In case you don’t want to use cream, slice 2-3 onions and cook them on low-medium heat in the remaining grease until they start to dissolve and everything thickens to a sauce.