Peel the neck end of the squash and chop into 2cm dice.
Peel the onions and chop the same size.
Peel and halve the garlic cloves.
Toss it all in a large shallow non-stick casserole pan with 1 tablespoon of olive oil and roast for 40 minutes.
Meanwhile, pile the flour into a large bowl with a small pinch of sea salt, then gradually add 150ml of water and mix into a dough.
Knead on a flour-dusted surface for 2 minutes, then divide into 4 equal balls and roll out thinly.
Dry fry for 1 minute on each side in a non-stick frying pan on a high heat, then wrap in tin foil and, when you switch the oven off, pop the foil parcel in to keep warm.
Transfer the casserole pan to a medium-high heat on the hob.
Pour in the tomatoes and 1 tin’s worth of water, breaking up the tomatoes with a spoon, then simmer for 10 minutes.
Return the frying pan to a high heat alongside, then trim the pork of any sinew, chop into 2cm chunks and place in the pan with ½ a tablespoon of oil.
Stir-fry for 5 minutes, then add the curry leaves, paste and 4 tablespoons of red wine vinegar, stirring for 1 minute until well coated and the pork is just cooked through.
Tip it all into the squash pan, stir together well, and season to perfection.