These are intense little flavour bombs: mushrooms stuffed with umami-rich butter then quickly roasted until golden and bubbling.
Serve as a side alongside meat or fish, in a noodle or rice bowl, or as the centre of a vegetarian meal with added protein such as egg, beans or tofu.
Preheat the oven to 220C / 200C Fan / Gas 7.
Put the butter, miso paste, herbs and garlic into a bowl or small food processor.
Beat or blend to combine all the ingredients.
Pull the stalks from the mushrooms and put the stalks on a baking tray.
Divide the flavoured butter between the mushroom caps, completely filling the hollow underside.
Put on the baking tray, butter side up, to join the stalks.
Grind over black pepper.
Put in the oven and roast until the mushrooms are tender, their tops golden and bubbling.
Tip: baste twice during the cooking, including over the mushroom stalks.
Small-medium mushrooms should take 13-15 minutes, larger ones 5-10 minutes more.