Preheat the over to gas mark 6/220°C (200°C fan)

Quarter the pak choi and roast with olive oil on the bottom shelf of the oven until it starts to soften (around 5-7 minutes).

Meanwhile, mix miso paste, lemon juice, maple syrup/honey, garlic clove ground to a paste, and sesame oil.

Remove the pak choi and apply the paste with a brush generously.

Return to oven for another 5-10 minutes.