Instead of the salmon, you can also use your favorite fish, such as tuna, pacific cod, horse mackerel, or sardines. If the fish has an unwanted flavor, you can add grated ginger or sake to the mixture to cover the fishy smell.
If you feel that your hamburg is too salty, use it as an ingredient for fried rice or pasta. This will make the dish surprisingly delicious!
The daikon peel can be cut into thin strips and used for Kinpira, a type of sauteed vegetables, or Asazuke, instant pickles. When making the kinpira with the daikon peel, stir-fry and season it with sugar and soy sauce, and top with toasted sesame seeds to give it a pleasant texture.