Cauliflower Soup with Crispy Kale Chips

• 1 tbsp extra virgin olive oil
• 1 brown onion, diced
• 3 cloves garlic, crushed
• 1 large head cauliflower, roughly chopped
• 3 sprigs thyme
• 5 cup vegetable stock
• 400 g tin white beans
• 4 kale stalks, leaves shredded
• .25 cup pumpkin seeds
• 1 tsp cumin