Deep fried mashed potato balls filled with meat and vegetables...how does that not sound delicious? I obtained this recipe from a friend's Japanese friend. While I love these korokkes, they are best served with Tonkatsu sauce (which can be found at most grocery stores in the Asian aisle...Kikkoman is the brand I use). I suggest preparing all the 'croquettes' and piling on a plate before you begin frying, as the process is very quick. I have only used Panko bread crumbs, and cannot verify the results using regular bread crumbs. Cook time includes boiling potatoes, sauteing meat and vegetables and frying croquettes.