Grandma Klingler's Cashew Turkey Pasta Salad

2 bone-in turkey halves, skin removed, or about 1 lb. precooked roasted turkey cut into cubes.
3 c. uncooked tri-colored pasta
1 small white onion
3/4 c. packed brown sugar
1 1/2 tsp. salt
2 c. salted cashew halves
2 celery ribs, diced
1 1/2 c. mayo
1 T. cider vinegar
1 1/2 tsp. lemon juice

Cook turkey, cool in fridge, then cube. Cook pasta, rinse in cold water and drain. Place pasta in large bowl with turkey and add diced celery and onion. In small bowl, mix mayo, brown sugar, cider vinegar, salt and lemon juice; pour over pasta mixture and toss to coat. Cover and refrigerate at least 2 hours. Stir in cashews just before serving.