You measure the oatmeal* by volume, not weight, and for two generous portions (and we are obviously hungrier than the Rude Health people as we've doubled the suggested quantities) put 200ml in a bowl, add 300ml of warm water, stir, cover, and leave to soak overnight. In the morning, bring a further 300ml of water to the boil, then add the oatmeal mixture and some salt and simmer for a few minutes. As to toppings/accompaniments, I'm always open to new combinations, but our current cream and maple syrup preference is hard to beat.
The porridge bowl pictured is from Anta and is in their Anderson tartan range - as that's my family name I should really get one. If Black Watch is more to your taste, it's Anta's Vintage Design of the Month, so you can order a piece specially in April and receive it in May, and if you're bargain-hunting (for their goods are not cheap), sign up for the Tartan Tuesday emails to be notified of their weekly offers.
*NB: not rolled oats.