To prepare the stew, heat one teaspoon oil in a large pan over moderate heat. Add the onions, garlic, and star anise, cooking until the onions have softened and partially caramelised, approx. 6 minutes. Add the celery, carrots, and potatoes and cook for a further 10 minutes, stirring regularly. Pour in the wine and allow it to reduce by half, then pour in the stock, Marmite® and bay leaves. Simmer the mixture for 4-5 minutes, then stir in the cornflour mix.

At the same time, heat the second teaspoon oil in a second, clean pan over high heat. Fry the Fable until coloured on all sides. Remove and place onto a plate lined with kitchen paper to drain. Add the Fable to the stew sauce and reduce the heat to low, simmering for 30-35 additional minutes. Check the vegetables (the potatoes in particular), as they should be tender.

In the meantime, make the celeriac puree. Start by making a beurre noisette. Melt the butter in a small pan over moderate heat. It will start foaming, and you will soon notice that the sizzling stops, and it will begin to smell nutty as the milk solids start to brown. Remove the pan from the heat and strain through a fine mesh sieve covered with a layer of muslin. Discard the milk solids in the muslin and reserve the browned butter.

Place the diced celeriac, milk, and salt into a medium pan. Partially cover with a lid and bring the mixture to a simmer. Cook until the celeriac completely softens. Transfer the mixture to a blender and blitz until smooth. Whisk in the beurre noisette.

Serve the stew with the celeriac puree.