In a large skillet, heat 3 tbsps of the peanut oil over high heat.
In a single layer, cook scallops until browned on the outside and just opaque in the center, about 2 minutes per side. Remove from pan and arrange on a plate.
Add remaining 1 tbsp of the peanut oil to drippings in pan.
Saute garlic until aromatic, around 30 seconds.
Pour in lemon juice, orange juice, soy sauce and grated orange peel.
Stirring frequently, allow mixture to boil until thickened to a syrup.