Wash the spinach and spin dry. Peel garlic and chop finely. Mix with the juice of 2 limes, sesame and oil. Mix with spinach.
Wash the coriander, shake dry and pluck off the leaves. Wash and clean spring onions and cut into fine rings. Rinse sprouts in a sieve with cold water, drain. Mix with spring onions and coriander.
Simmer broth and coconut milk in a pot for about 5 minutes. Stir the starch with 4 tbsp. water until smooth. Stir into the boiling soup and simmer for about 2 minutes. Season to taste with salt, pepper and lime juice. Serve soup with spinach and sprouts mix.