Black Bean Soup with Green Pepper

Ingredients

• 2 tsp vegetable oil
• 1 green bell pepper (cored, seeded and diced)
• 2 spring onions (sliced)
• 3 garlic cloves (minced)
• 16 oz black beans (drained and rinsed)
• 1-1/2 cups vegetable stock
• 1 tsp ground coriander
• 1 tsp ground cumin
• 2 tbsp sour cream (reduced-fat)
• 1/4 cup diced tomatoes