Grilled Mahi Mahi With Pineapple

• 4 green onions (chopped)
• 350 ml unsweetened pineapple juice
• 260 gr mahi mahi fillet
• 60 ml sodium soy sauce (reduced)
• 40 gr packed brown sugar
• 16 ml sesame oil
• 4 gr ginger root (grated)
• 4 gr garlic (finely chopped)
• 1 gr pepper (crushed red)
• 4 slices pineapple (fresh)