In a bowl, mix together all sauce ingredients and cover and put in the fridge.
Remove all bones from the fillet. Brush the fillets with the oil, salt, pepper and onion powder and bake however you prefer. I find higher temperature for shorter time is best flavor but salmon can be baked how you wish. Typically for a 1″ thick piece of salmon, about 12-14 minutes is perfect in a 425F oven.
When the salmon is done cooking, serve with the sauce spooned on top as you wish.