Combine the preserves, mustard and curry powder in a large skillet and heat over low heat, stirring constantly, until preserves are completely melted and smooth.
Place cashews in a shallow dish or bowl. Dip chicken breasts in skillet sauce, then roll in nuts to coat and place in a lightly greased 9x13 inch baking dish.
Bake at 375 degrees F (190 degrees C) for 20 to 30 minutes. Boil any remaining sauce and serve on the side with the baked chicken.
