To prepare dressing, combine vinegar, lemon juice, oil, garlic, honey, lemon peel, salt, and pepper; mix well; set aside. Rinse and drain quinoa; combine with stock and water in large saucepan. Bring to boil, reduce heat, cover, and simmer 10 to 15 minutes. Drain any remaining liquid. Add 1/2 cup of dressing to hot cooked quinoa; mix well and cool. Add grapes, pea pods, white beans, celery, cilantro, and peppers; mix with the remaining 1/2 cup of dressing and set aside. Chill until ready to serve.