Carrot & Sweet Potato Soup with Spinach

Name: Carrot & Sweet Potato Soup with Spinach
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Ingredients: 1 tbsp olive oil; 1 onion, finely chopped; 2 cloves garlic, crushed; 4 large carrots, chopped; 4 large parsnips, chopped; 1 large sweet potato, chopped; 100g fresh spinach; 2 tsp ground cumin; 2 tsp ground ginger; 1 tsp ground coriander; 2 1/2 pints/1 1/4 litre/5 cups vegetable stock (4 cubes); a good grinding of salt and pepper