Place your whiting in the bottom of your baking pan in a flat layer.
Layer the minced garlic and grated ginger onto the fish.
Grate the zest of an entire lime on the fish and season with onion powder, salt and black pepper.
Slice the lime into thin slices and layer the fish with the lime slices (as many or as little as you want). Finally, chop the butter into chunks and top the fish.
Place the fish into a 350 degree oven for 20 minutes.
Serve immediately or store in a seal-able container in the fridge up to 3 days.