The parmesan brings out the flavours of the courgettes, but
don't boil or microwave after the cheese is added or it will
begin
to coagulate.
In a shallow pan, soften the courgettes in the hot oil for about 20
minutes with the lid on, adding the garlic half way through cooking
to prevent it burning.
Add the stock and season with salt and pepper, bring to a simmer
and cook gently for about five minutes.
Take off the heat, allow to cool a little and liquidise in the
blender.
Pour back into the saucepan, and add the parsley and
parmesan.
Check for seasoning and serve with char-grilled ciabatta.