To make the marinade:
In a small bowl, add the pineapple juice, garlic, soy sauce and ginger. Stir to mix evenly.
Arrange the salmon fillets in a small baking dish. Pour the pineapple juice mixture over the top.
Put in the refrigerator and marinate for 1 hour. Turn the salmon a few times in the marinade.
To cook the salmon:
Heat the oven to 375 F.
Lightly coat 2 squares of aluminum foil with cooking spray. Place the marinated salmon fillets on the aluminum foil.
Drizzle each with 1/8 teaspoon sesame oil.
Sprinkle with pepper and top each with 1/2 cup diced fruit.
Wrap the foil around the salmon, folding the edges to seal.
Bake until the fish is opaque throughout when tested with the tip of a knife, about 10 minutes on each side.
Transfer the salmon to warmed individual plates and serve immediately.