Heat the oil in a sauté pan with a lid over a medium heat. Add the shallots and cook for 8 mins, stirring occasionally, until softened. Stir in the garlic and cook for 1 min more, then add the spices. Cook for a further 30 secs until fragrant.
Tip in the aubergine and give everything a good stir to coat in the spice mix. Add the creamed coconut, a pinch of salt and 500ml boiling water. Break down the creamed coconut with the back of a wooden spoon, then put the lid on and cook for 15 mins until the aubergine is tender.
Meanwhile, heat oven to 180C/160C fan/gas 4. Dot the butter over the naans, wrap the leftover bavette in a foil parcel, then put them both on a large baking tray to warm through for 5 mins. Tear the naans into pieces.
Taste the aubergine for seasoning, then pile up the bavette in the middle of the curry. Sprinkle over the almonds, pomegranate seeds, and a dollop of yogurt and mango chutney, if using. Serve from the pan in the middle of the table with the naan on the side for scooping.