Defrost the beans. Clean, wash and drain the spinach. Clean the chillies, halve them lengthwise, remove seeds, wash and chop finely. Peel garlic and chop finely. Clean, wash and chop the spring onions.
Peel and slice the onion.
Wash the fish, dab dry, cut into large pieces and turn in starch. Heat oil in a wok or frying pan. Fry the fish in it until golden brown and take it out. Sauté chilli, garlic, spring onions and onion in frying fat for 2-3 minutes.
Add the beans and fry for about 3 more minutes.
Stir in curry paste. Add coconut milk and 100 ml water, bring to the boil. Season with salt and pepper. Simmer over low heat for about 5 minutes. Add the spinach about 2 minutes before the end of the cooking time.
Warm the fish briefly in it again. Season with lime zest and juice.