Swordfish or salmon fillets
1 sm. chopped onion
1 garlic clove, quartered
1/4 c. soy or stir fry sauce (like Joyce Chen's)
Scant 1/4 c. orange juice (or even less)
Juice, rinds, and pulp of a lemon (or equivalent in juice)
Juice, rinds, and pulp of a lime (or equivalent in juice)
Splash of ketchup
Pepper

Put fish fillets in non-metal baking dish. Combine the marinade ingredients, pour over fish and refrigerate at least 4 hours, turning the fish occasionally. Good on the grill or baked (in the marinade).