Pumpkin Risotto - A better choice!

Ingredients

• 6 cups vegetable stock
• 1 bay leaf
• 4 tbsp unsalted butter
• 1 small brown onion, diced
• 1 tsp salt
• 3 garlic cloves, minced
• 2 cups arborio rice
• 1 cup dry white wine
• ½ cup parmesan, grated + extra to garnish
• 420g pumpkin purée (see notes on how to prepare this)
• Fresh sage leaves, to garnish