Sweet Potato and tomato soup

WHAT YOU'LL NEED

• 400 g sweet potato washed and sliced into 2 cm cubes
• 2 tablespoon oil
• 2 onions finely chopped
• 80 g carrots cut into 1 cm cubes
• 1 tablespoon minced garlic
• 1 tablespoon grated fresh ginger
• 1 chilli pepper deseeded and finely chopped
• 1/2 teaspoon cumin powder
• 0.5 l water
• 300 ml coconut milk
• 2 Knorr vegetable stock pot
• 200 g tomatoes cut into 1 cm cubes
• 4 slices of sourdough bread