Starter

Heat rapeseed oil in a large saucepan and add the onion; cook over medium heat until soft
Add celery, leek, potato and butter; stir until butter melts, cover and sweat for 5 minutes
Remove the lid
Pour in hot vegetable stock and add chunky broccoli stalk pieces
Cook until the vegetables are soft, about 10–15 minutes
Add the remaining broccoli and cook for 5 minutes
Transfer to a blender and blitz until smooth
Stir in the stilton, leaving some lumps
Season with black pepper and serve