Asian Kitchen - Grilled salmon with orange and ginger sauce

Grilled salmon with orange and ginger sauce 

1 kg salmon fillet, retaining the skin 

1- ½ orange, sliced 

1- ½ lemon, cut into slices 

A pinch of salt and black pepper  

Ingredients for orange and ginger sauce 

75 gm butter  

1 cup natural orange juice 

2 tablespoons orange and ginger jam 

3 tablespoons soy sauce 

2  garlic cloves, crushed 

Lemon zest