Buttermilk sweetcorn bisque with radish and wild garlic

• 20 g unsalted butter
• 1 onion, chopped
• 1 stick of cele

Melt the butter in a large pan, add the onion, celery, garlic and thyme and leave to cook over a low heat for 10-12 minutes until the vegetables are soft. Add 750 ml water to the vegetables with the cob centres. Bring to the boil, reduce the heat and simmer for 20 minutes over a gentle heat until t