Heat the vegetable oil in a deep pan. Add the finely chopped red onion and cook over a low heat until softened. Finely chop the ginger, add it along with the crushed garlic clove and chilli flakes to the pan. Cook for about a minute.

Add the rest of the spices, tumeric, cumin and garam marsala and cook for a further minute. Turn up the heat to medium, add jerusalem artichoke cut into even chunks, and stir everything together so the artichoke is coated in the spice mixture.

Tip in the 250g red split lentils, 600ml vegetable stock and some seasoning. Bring the liquid to the boil, then reduce the heat, cover and cook for 20 mins until the lentils are tender.

Loosely chop the cavolo nero. Then stir it into the lentil mixture. Once wilted, remove the pan from the heat and serve immediately.