Melt the butter in a large wok, karahi or non-stick frying pan over a medium-high heat and cook the mushrooms for 10 mins, or until any moisture has evaporated and they’re starting to brown. Transfer to a bowl and set aside.

Heat the oil in the same pan over a medium-high heat and fry the cumin and fennel seeds, stirring continuously for about 30 seconds until they release a nutty aroma. Stir in the onion and cook for 12-15 mins until golden. Reduce the heat to medium, then add the garlic and continue frying for 1 min. Add the ginger, turmeric, chilli powder and garam masala, followed by the tomatoes and sugar. Cook, uncovered, for 5-7 mins, or until the masala thickens and a layer of oil forms around the edge of the pan.

Meanwhile, cook the Basmati rice according to the packet instructions. If using dry rice make sure you allow the rice to steam over a colander for a few minutes once cooked as this makes for much fluffier, lighter rice.

Spoon the yoghurt into a small bowl, add a small ladleful of the hot masala and mix well before stirring the yoghurt into the pan of masala. Pour in 100ml hot water (to serve 4) and simmer for 3-4 mins until the curry has the consistency of double cream. Season to taste, then return the mushrooms to the pan and stir to warm through. Scatter with the chopped coriander and serve with the cooked rice.