Heat the oil in a large nonstick skillet over medium-high heat. Add ginger and garlic; stir-fry 2 minutes or until lightly browned. Add scallops; stir-fry 3 minutes or until the scallops are done. Add rice, pineapple, juice, salt, and pepper; stir-fry 2 minutes or until thoroughly heated. Sprinkle with cilantro.