line a baking tray with foil, mist with oil, and heat in the oven whilst it is warming up.
cut the pak choi down the middle, and once the oven has reached temperature, remove the tray and lay the pak choi halves on it with the middle facing upwards.
drizzle the olive oil and soy sauce over the leaves, and sprinkle the Nanami Togarashi.
Return to the oven and roast for 15-20 mins. Personally, I like it more when some of the leaves start to crisp up a bit.
Notes
Nanami Togarashi is a Japanese mix of chilli pepper, orange peel, black sesame seed, white sesame seed, Japanese pepper, ginger, and seaweed