Cauliflower Soup with Crunchy Rye Parmesan Garnish

Ingredients

• 1 medium cauliflower with leaves
• 1 medium brown onion, finely sliced
• 1 leek, sliced
• 2 cloves garlic, minced
• 2 sprigs thyme
• 850ml chicken or veg stock
• 1 cup milk (oat or regular)
• 1 tsp white miso paste
• 2 tsp wholegrain mustard
• Salt and black pepper
• Handful chives for garnishing