If using pre-cooked rotisserie chicken, shred the chicken and proceed to Step #5
Pre heat the oven to 375 degrees. Line a rimmed baking pan with parchment paper.
Season the chicken breasts with olive oil, and half of the salt and pepper. Place the chicken breasts on the prepared sheet pan and roast at 375 for 35-45 minutes or until a thermometer inserted into the deepest part of the breasts reads 165 degrees. Chill for 30 minutes or until cool enough to handle.
Remove the skin and bones from the cooled chicken and shred or chop the chicken meat into bite size pieces. Add the chicken to a large bowl.
To the chicken, add in the green onions, celery, red onions, raisins and cubed mango. Add the chilled dressing to the chicken mixture stiring well to coat the entire mixture well. Chill for at least 2 hours or overnight.
Just before serving, stir in the cashews. Serve with the sliced mangos on the side- see photo.
To store- Cover remaining chicken and store in the fridge up to 4 days.