In a large pot, cook chicken in lightly salted boiling water for 20 minutes. Drain, cool, and cut into 1/2-inch strips.
In a large bowl, stir together chicken strips, raisins, and half of the mango.
In a medium bowl, mix together mayonnaise, curry powder, chutney, and lemon juice. Season with salt and pepper, then toss gently with chicken mixture. Stir in half the nuts. Transfer to a platter, and garnish with remaining mango strips and cashews.
