Firstly my mistake; I had never tried a form of squash which wasn't butternut squash before and I bought a kabocha squash in waitrose thinking it might be easier to prepare than a butternut squash. I was wrong. To the point where half the squash went to waste which was very unusual for me.
1/2 peeled kabocha squash
1/2 red onion
1 handful fresh coriander
1.5 litre vegetable stock
Chop and boil the onion, courgette and squash in the vegetable stock. Add the lentils and boil until soft. Add the coriander and blend.