The secret is not to use freshly boiled water (I use 100ml cold water topped up to 350/400ml of boiling), not to use TOO much PH and not to over-mix. I can use my braun hand blender because I've been doing it for so long and I know how not to make it gloopy - but you'd probably be better off making up the soup as normal, pouring it into a bowl and whisking the PH in gradually with a fork or a balloon whisk. (Same technique as the porrige)
In the cold weather, a toffee and walnut shake made as a porrige with some cinnamon sprinkled over really makes a 'proper' breakfast if you need it.