Roasted pumpkin and carrot soup with Bürgen croutons - Bürgen

Ingredients

• Pumpkin, cut into 1cm pieces – 1 kg
• Carrots, cut into 1cm pieces – 800 g
• Olive oil – 1/4 cup
• Brown onions, thinly sliced – 2
• Salt
• Cloves garlic, crushed – 2
• Mustard seeds – 1 Tbsp
• Coriander – 2 tsp
• Ground cumin – 1 tsp
• Ground turmeric – 1 tsp
• Ground cardamon – 1/2 tsp
• Chilli powder (optional) – 1/2 tsp
• Vegetable stock – 4 cups