Whilst on holiday in France, we stayed at a Chambre D'Hote that also offers "Table d'Hote" i.e. an evening meal with the family.
The place was lovely but so was the meal, a simple salad to start, bread and wine and the most delicious salmon and courgette lasagne.
The owner spoke no English but I managed to get the gist of the recipe out of her and this is my take on it, not a copy by any means but also delicious. She used yellow courgettes right out of her garden but I could only get green ones back home.
If on slimming world, this is 10 Syns per portion but you can easily adapt by using fry lite to roast the courgettes and reducing the amount of parmesan. If reducing the parmesan, use a stock cube in the roux to give the extra flavour boost.