Start by removing the skin and bones from the rotisserie chicken. Shred or dice the meat into bite-sized pieces.

Finely dice about a cup of celery and a small red onion. Place them in a mixing bowl.

Combine the shredded chicken with the diced celery and red onion in a large mixing bowl.

In a separate bowl, mix together mayonnaise, the juice of one lemon, and a pinch of salt and pepper. Pour this dressing over the chicken and veggies.

Cover the bowl with plastic wrap and refrigerate for at least 30 minutes before serving.