Prepare the cleaned bangus by seasoning these with salt. In a pan with hot oil, fry the fish until golden brown. Flip if needed. Once golden, set aside.
In another pan, melt butter and saute garlic until aromatic. Add in chillies, oyster sauce, sugar, and pepper. Mix well.
Pour in Sprite, cook until the sauce has slightly reduced. Add back the friend milkfish. Cook for a few minutes, basting the fishes to make sure the sauce is well absorbed.
Garnish with spring onions before serving.