Rinse the pudding rice in a sieve under cold water and drain.
If you are not using a non-stick slow cooker, use a little butter to grease the bottom and sides of the slow cooker pot to stop the pudding from sticking as it cooks.
Add the rice, melted butter, milk, cream, sugar, vanilla extract and ground nutmeg to the slow cooker pan and stir to mix.
Place the lid on and cook for 3 hours on low. You can give the rice a stir half way through the cooking time or just leave it. Slow cookers do vary, so check the rice after 2 hours and again after 2 hours 30 mins - it's done when the rice is tender (not mushy) and the creamy sauce is thick and silky.
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Notes
Once cooked, this rice pudding can be kept in the fridge and reheated, or frozen. I recommend only reheating this once, and do so thoroughly.
Slow cookers can vary, so make sure you keep an eye on this after 2 hours. If it appears to thick and dry, add a splash extra milk. If it's not thickening, turn it up to high for 30-60 minutes.
Try adding sultanas, chocolate or even mincemeat for a variation on this recipe.