Over medium high heat, heat the orange juice, lime juice, ginger, honey and coconut aminos/soy sauce in a medium sauce pan.
Allow the mixture to come to a boil, and heat until sauce has thickened to a sauce-like consistency, approximately 10-15 minutes. I find that stirring the sauce constantly helps it to thicken faster. Watch towards the end that it does not burn. It is finished when it has reached a honey-like consistency (see photo above)
Spread sauce over salmon.
Garnish with slices of oranges, if desired.
Place in oven for 8-12 minutes, depending on thickness of salmon pieces.