First make a stock. Put the miso in a large jug, pour over a litre and a half of just-boiled water, stir and put to one side.
Put four tablespoons of oil in a casserole pot on a medium heat and, once it’s hot, add the sliced spring onions and salt, and cook, stirring, for three or four minutes, until softened.
Add the rice and ginger, stir to coat the rice in the oil, then pour in the miso stock and bring to a simmer.
Turn down the heat and leave to cook, stirring occasionally, for 25 minutes.
Add the peas, cook for a further five minutes, then stir in the white pepper. By this point, the rice should be starchy but creamy, soft and almost soupy.
While the rice is cooking, make the mint and sesame oil. Put the mint, rice vinegar, toasted sesame oil and a tablespoon of rapeseed oil in a small bowl and stir to combine.
Distribute the rice between bowls, spoon some of the mint and sesame oil over the top and serve.
