Serves 2

75g/ 3oz firm white fish fillet, such as cod, coley or haddock, skinned

2 tsp Thai fish sauce

2 birds= eye chillies

1 garlic clove

200g/ 7oz white crabmeat, thawed if frozen, or canned

2 heaped tbsp coconut cream

2 spring onions

15g/1-2oz fresh coriander and basil

sunflower oil, for brushing

1 small ripe, firm mango

1 small red onion, finely chopped

1 lime

1 tsp white wine vinegar

2 tbsp light olive oil

50g/ 2oz bag ready to use watercress

salt and freshly ground black pepper

Cut the white fish into chunks, making sure that there are no bones and place in a food processor. Chop up the chillies and garlic and add, then whizz for a few seconds to make a rough paste.

Add the crabmeat and coconut cream and whizz again for a few seconds until just blended (you don’t want to overdo it at this stage and lose the crab’s texture). Scrape the mixture into a bowl.

Heat a flat griddle pan, finely chop the spring onions and then coriander and basil and add to the bowl (reserving a heaped tablespoon of the herbs) stirring to combine. Season to taste.

Using wet hands shape the mixture into 4 x 7.5cm /3in patties and brush with the oil. Add to the pan and fry for 2-3 minutes on each side until lightly golden.

Slice the flesh away from each side of the mango’s flat stone. Score the flesh into a small criss-cross pattern, turn out like a hedgehog and cut into a bowl.

Add the reserved herbs, the onion, vinegar and olive oil. Squeeze in the lime juice and season to taste. Mix well. Tip half of the salsa into the watercress and toss to combine.

Arrange the watercress mixture on a serving plate and spoon some more of the salsa into a small dipping plate and place on the side. Place two of the crab cakes on top and serve at once.

And here are Ainsley's top tips chosen for this special feature on Mark and Nina's show;

"I'm not a fan of 'weight loss diets' so i believe the trick is,

  - to eat a good balanced diet

  - I don't believe in cutting out breakfast

  - and if you can't face food in the morning, you should drink a fresh fruit smoothie"