Step 1

The night before, dust off the piece of kombu with a dry kitchen cloth. Pour the soy sauce into a air tight jar and then add the kombu. Close it tight and refrigerator overnight.

Step 2

Cut two pieces of watermelon lengthwise 2 3/4 inches thick. Place it flat onto a cutting board and then cut out a 5x3 inch rectangle. Repeat with the other slice. Cut down the thickness of the watermelon to just about 2 1/2 inches.

Step 3

Salt the watermelon and then let it rest.

Step 4

In the meantime, mix together the soy sauce, mirin, molasses and sake.

Step 5

Dry the watermelon and then pour the marinade over it. Let it rest while making the negi miso sauce.

Step 6

In small bowl add the miso paste, mirin, sake, soy sauce, sugar and grated ginger and whisk together.

Step 7

Add scallions to a pan over medium high heat. Drizzle in sesame oil and fry for 1 minute. Add the sauce and cook until slightly reduced (about 1 minute). Remove from heat and transfer to a bowl.

Step 8

Grease a large pan over medium low heat. Place the watermelon 'steaks' into the pan and cook for about 4 minutes covered. Remove the lid and then continue to cook for another 1-2 minutes. Flip the watermelon steak and repeat. Remove the watermelon from the heat and onto a plate.

Step 9

Into a shallow bowl stir together the cake flour and water until smooth. Prepare plate with flour and another plate with panko.

Step 10

Prepare deep fryer or enough oil over medium heat.

Step 11

Place the watermelon into the flour and coat the entire slab. Then place it into the dredge and coat evenly. Then place it into the plate with the panko and coat generously on all sides until fully covered with panko.

Step 12

Once oil reached 350 F, carefully place the watermelon 'steak' into the oil and fry each side for 45-60 seconds. Remove from oil and place on a wire rack.

Step 13

Add shredded cabbage to a plate along with wasabi and your choice of sides. Prepare small bowls with negi miso and kombu soy sauce. Cut the wagyumelon katsu stright down (this will help the panko stay intact) into bite sized slices. Serve and enjoy!