Poke each potato with a fork a few times to allow steam to release while cooking. Cook the potatoes in the microwave for 10 minutes or until the potatoes are soft enough to smash. Set aside.

Preheat the oven to 350°F (180°C or gas mark 4).

Melt the butter in the microwave then stir in the miso and garlic until smooth. Depending on thickness of the miso paste (all store-bought ones are different) you may need to put the whole mixture back in the microwave for 10 to 15 seconds to soften the miso paste in order for it to combine.

Using a potato masher or fork, smash each potato so they break. Drizzle them with the miso butter and use a spoon or spatula to make sure they are completely coated.

Place the pan in the oven and roast for 25 minutes. When cooked, garnish with the sliced scallions, sesame seeds and fresh cilantro.