Black Bean Gratin in miso and mirin

Prep everything first: chop the aromatics, measure the miso and mirin elements, and pat the black bean dry so it colours well.

Warm the olive oil in a large pan over a medium heat and soften the onion and garlic until sweet and translucent, about 5 minutes.

Add the black beans and braise until it takes on colour and the edges catch, 4 to 6 minutes.

Stir in the soy sauce and the rest of the miso and mirin flavours, letting them cook out for a minute until fragrant.

Add the leek along with a splash of stock or water, then cover and cook gently until everything is tender and the sauce clings.