As with the most things in Latvian cooking, pretty much every family would have a different recipe for meatballs.  Based on discussions among the members of Latvian Favourite Foods Facebook group, here are the most popular variations & additions to kotletes:-Use half beef, half pork or 2/3 beef and 1/3 pork-Add finely chopped onion-Add finely chopped sauteed onion and bacon-Instead of adding soaked crust-free bread or breadcrumbs, add grated potato or oatmeal flakes-Add pinch of nutmeg, ground cloves, caraway, garlic or parsley-Roll kotletes in flour or breadcrumbs before frying-Fry in lard instead of oil