Chop off about a quarter of the squash and slice into chunks- no need to take the skin off. Coat in a little olive oil, salt and pepper, then add to a baking tray, then bake in the oven on 180c for approx 40- 50 minutes until roasted nicely.
Whilst it’s roasting, add your oil and onion to a wide bottom pan and fry gently on a low heat for around 10 minutes until soft and browning.
Peel and de- seed the rest of the squash and chop into small cubes. Add to the pan with the garlic and fry for a further 5 minutes.
Add the rice, thyme and a splash of white wine to the pan and stir thoroughly to combine. Pour in about 400ml of the stock.
Turn up the heat a little and then keep adding more stock when the rice has absorbed the liquid. Repeat until the rice is cooked but still has a little bite and the squash is tender.