Heat another large skillet over high heat so that it will be hot enough for searing.
Sprinkle the scallops with a little salt and pepper.
Add the coconut oil to the hot skillet and cook the scallops until the edges are browned, about 2 minutes per side.
Remove the scallops to a large plate and cover to keep warm.
Add the water, lemon juice, coconut aminos and curry powder to the skillet in which the scallops were seared. Deglaze the pan with a wooden spoon while bringing the mixture to a boil and then boil for about 2 minutes.
Remove the sauce from the heat, and add the remaining 2 tablespoons ghee, 1 tablespoon at a time, and whisk to combine.
Arrange the scallops, mushrooms and onions on 4 plates and spoon the sauce over each.