In a large bowl, whisk together all ingredients except pot roast and ghee.
In a large skillet, heat ghee over high heat. Once melted, quickly sear all sides of the chicken livers, for about 20 to 30 seconds per side or until you get a nice fast golden brown crust on all sides.
Place livers in a greased baking dish and pour orange mixture over the top. Cook for 25-30 minutes, or until the chicken livers are cooked through. Serve with cooking juices.