Wash the scallops and prawns in the lemon juice with a little added water, then drain, rinse and roughly chop into 1cm pieces
2
Place the seafood in a bowl with the lime juice, orange juice and salt. Place in the fridge and leave to marinate for 30 minutes
3
Meanwhile, place the rest of the ingredients in a serving bowl. When the seafood has marinated, stir it into the vegetables (including any liquid in the bowl), leave to sit for a further 10 minutes, then serve