I use a potato peeler and make thin slices of courgette, squeeze as much fluid out as possible through a clean tea towel, and then fry lightly in butter ...... tastes lovely with the bolognese sauce over the top.
Try chocologic, found it at Morrisons .......... very nice, 5 giant buttons 3g carbs. 1/6th of the block one (i.e. 4 squares) 2.5g carbs.
They have it in both dark and milk chocolate, giant buttons and blocks.