Cheese croissant bread and butter pudding

Method

1. Heat the oven to 160°C fan/gas 4. Halve the croissants horizontally and lay them on a baking sheet. Put them in the oven for 5 minutes, then remove them to cool – you can turn off the oven now as you won’t need it for a bit. This helps the croissants dry out so they’ll greedily soak up the custard.
2. Arrange half the halved croissants, cut-side up, in the baking dish. Scatter over half the cheese and all the ham, then arrange the rest of the halved croissants, cut-side down, on top.
3. Stir the milk and cream in a pan and warm until just steaming. Remove from the heat, whisk in the eggs, yolks, chives and mustard, then season with salt and pepper. Slowly pour the mixture evenly over the croissants, then cover and chill for an hour or overnight. If you can, tilt the dish from time to time and baste the croissants with the custard to make sure it’s absorbed.
4. Reheat the oven to 160°C fan/gas 4. Remove the dish from the fridge, scatter over the rest of the cheese, put the dish on a baking sheet to catch any drips, then bake until the custard is just set and the cheese is bubbling (30-35 minutes). Let it sit for 5-10 minutes before serving with whatever your heart desires (within reason).