Spicy Cauliflower Soup

Ingredients

• 1 (350 g) russet potato, peeled and chopped
• 1 (450 g) small cauliflower, chopped
• 1 (175 g) small onion, chopped
• 1 tablespoon (15 ml) vegetable or olive oil
• 1 garlic clove, crushed
• 1 tablespoon (15 ml) grated ginger root
• 1 teaspoon (5 ml) curry powder
• 1/2 teaspoon (2.5 ml) cumin seeds
• 1/2 teaspoon (2.5 ml) black mustard seeds
• 1 teaspoon (5 ml) ground coriander
• 1/8 teaspoon (1.25 ml) ground white pepper
• 2 cups (500 ml) vegetable or chicken stock
• 3 tablespoons (45 ml) water
• 6 oz. (170 g) Greek or natural low fat yogurt
• Kosher salt to taste