Thaw fish and shrimp if necessary. Cut fish in fubes and dip in lemon juice. Lightly brown vegetables in oil. Add bullion, 1 dl. pineapple juice, pineapple pieces, vinegar, sugar, ginger, garlic, soy sauce, cayenne pepper and salt. Stir gently for 3-4 minutes. Add fish and stir another 4-5 minutes. Add shrimp. Mix cornstarch and water and add to other ingredients. Boil a 1-2 minutes. Garnish if desired.
Coconut-rice: Boil water and coconut flakes for 2-3 minutes. Cool and strain. You should now have approximately 4.5 dl. coconut-milk. Add extra water if necessary. Add salt and bring to a boil. Add rice. Boil in mixture according to directions on rice package.
Serve rice separately.