Mushroom and onion pâté on rye

Soak the porcini mushrooms in just-boiled water for 10 minutes then drain. Very finely chop the soaked porcini and the chestnut mushrooms and onion. (Alternatively, put the mushrooms and onion in a food processor and pulse until very finely chopped.)

Put the butter and olive oil in a large non-stick pan set over a low-medium heat. Add the mushroom mixture and garlic then fry, stirring frequently, for 20-25 minutes, until golden and all the cooking juices have evaporated. Transfer to a bowl and leave to cool to room temperature.

Mix in the yogurt, crème fraîche, vinegar and most of the lemon thyme leaves; season. Whizz in a food processor or with a stick blender to your desired consistency. Toast the rye bread until crisp and drizzle with a little olive oil. Scoop the pâté into a bowl and scatter over the remaining thyme leaves; serve with the rye toasts and celery sticks.