Firstly, it's all about poaching them long and slow. A few days ago I'd poached some in a sugar and water syrup (with a cinnamon stick and vanilla pod) - cooking them low and slow on the stovetop. So I just re-used the same poaching liquid adding a good splash of white wine this time and cooking them in the oven. I think the change from pale pear colour to the jewel-like ruby red is half the appeal in cooking with quinces.
Last step was to make a white chocolate cream (150ml white chocolate melted in 100ml cream and folded into a further 200ml of whipped cream). And with a dollop of that and some toasted flaked almonds on top, I had a dessert ready to knock my guests socks off!