Place scallops in a shallow dish. Add vodka, vermouth, and half of ginger mixture; toss gently. Cover and marinate in refrigerator 30 minutes.
Melt margarine in a large skillet over high heat. Add remaining ginger mixture, and sauté 30 seconds. Add orange rind and juice, and bring to a boil. Stir in spinach, salt, and pepper; cook 2 minutes or until spinach wilts. Remove from skillet, and keep warm.
Remove scallops from marinade, reserving marinade. Place skillet coated with cooking spray over high heat until hot. Add scallops; cook 1 1/2 minutes on each side or until golden brown. Remove from skillet; keep warm. Add reserved marinade to skillet. Bring to a boil; cook until sauce is reduced to 1/4 cup (about 5 minutes).
Arrange scallops over spinach mixture; drizzle with sauce.