To prepare the aubergines cut them in half lengthwise.
Score the flesh with the tip of a sharp knife making a diamond pattern ie. long diagonal incisions across the entire surface of the eggplant (without cutting too deep) and repeating the same from the other side.
Sprinkle the cut side of the eggplant with excess salt and rub onto the flesh.
Place the eggplant salted flesh down on a wire rack over a sink or baking tray to catch the moisture coming out. Leave them for at least 30 minutes, prepare the glaze in the meantime.
Combine the miso paste, vinegar, honey and 1 tablespoon mirin in a small pot. Bring to a simmer while whisking and set aside.
Heat up a pan on high heat and add a tablespoon oil. Place the eggplants with the skin side down in the pan and cook for about 5 minutes or until the flesh has turned golden brown.
Turn the eggplant around and cook the skin side for another 3 minutes. Once cooked place the eggplants on a wire rack sitting on top of a oven tray.
Using a brush glaze the eggplants with the miso glaze and sprinkle with sesame seeds.
Bake in a pre-heated oven at 180°C (355°F) for about 20-30 minutes or until the eggplants are cooked.
Use a skewer to check the doneness by inserting into the eggplant; you should not feel any resistance.
For the garnish, shave the red onion on the mandoline and season with salt. Leave for at least 10 minutes and strain off the liquid from the onions.
Slice the white radish on the mandoline and marinate in the remaining mirin.
To plate up, arrange the radish and onion on top of the eggplant. Sprinkle with the sprouts and serve warm.