Broccoli & Stilton soup

Ingredients

• 2 tblsp Rapeseed Oil
• 1 finely chopped Onion
• 1 Celery
• 1 sliced Leek
• 1 medium Potatoes
• 1 knob Butter
• 1 litre hot Vegetable Stock
• 1 Head chopped Broccoli
• 140g Stilton Cheese