Creamy cauliflower and leek soup

Ingredients

• 1 tbsp olive oil
• 1 small brown onion, diced
• 2 cloves garlic, finely chopped
• 2 medium leeks (around 250g) , green outer layers removed and roughly chopped
• 750g cauliflower florets (1 small cauliflower head)
• 250g potato peeled and diced
• 650ml salt reduced vegetable stock
• 1 cup (250 ml) So Good Oat Extra creamy
• 2 Tbsp parsley leaves chopped, to serve
• Salt and pepper, to taste (optional)