Preheat 5-quart Instant Pot on Sauté-Normal. Add celery, onion and oil; cook 5 minutes or until tender-crisp, stirring occasionally. Add ginger; cook 1 minute or until fragrant, stirring frequently. Stir in broth, juice, lentils and cider. Place lid on Instant Pot and close pressure valve to seal; pressure cook on high 10 minutes. Quick release pressure; let stand 10 minutes. Makes about 9 cups.
Serve soup garnished with yogurt, cilantro and/or pepper, if desired.