Add the remaining 2 teaspoons oil to the skillet or wok. Add carrot, celery, mushrooms, green onions, and ginger; stir-fry for 3 to 4 minutes or until vegetables are tender. Add egg mixture; let stand for 5 to 10 seconds or until egg sets on bottom but remains runny on top. Add rice and bean sprouts. Turn and toss mixture continuously for 1 minute. Stir in shrimp, peas, and soy sauce; heat through.