Defrost the seafood, wash and pat dry. Peel and finely chop the garlic. Wash the spring onions and cut into 3 cm pieces. Wash and peel the cucumber, halve lengthways, remove the seeds and cut into slices. Wash the tomatoes, remove the stalks and roughly dice.Heat the oil in a large pan and sauté the garlic. Add the seafood and fry for a few minutes. Stir in the rice, tomatoes, cucumber and spring onions. Stir-fry for a further 5 minutes. Flavour with salt, pepper and fish sauce. Serve garnished with parsley.