I ran out of Mullerlite yoghurts - so I mixed the porridge oats with VLF natural yoghurt and mixed in a heaped teaspoon of lemon curd - delicious, not quite as sweet but it had a nice sharp, lemony tartness, lovely....
I counted 1½ syns for the lemon curd.
You could also add a little sweetner if you prefer your porridge a bit sweeter.