How to Make It
Cook pasta according to package directions for salted water. Drain and rinse with cold water; drain.
Cook green beans and celery in boiling salted water to cover until tender-crisp, about 2 minutes. Drain and plunge into ice water to stop the cooking process; drain. Combine pasta, green beans, celery, pinto beans, and kidney beans in a large bowl.
Combine shallot and vinegar in a medium bowl; let stand about 5 minutes. Add lemon zest, lemon juice, mustard, and honey, stirring with a whisk. Gradually whisk in oil until well combined; pour over bean mixture. Sprinkle with salt and pepper; toss gently. Sprinkle with chives, and serve immediately.