Season the chicken breasts on both sides with salt and pepper. Using a wide saucepan, heat the stock to a simmer over medium heat. Place the chicken breasts in the pan. Poach uncovered for approximately 5 minutes; then flip the breasts and poach for 5 minutes more. The chicken will be done when it is firm to the touch; you may cut 1 open just to be sure. Remove the chicken from the pan and set aside on a plate. Cover with foil to keep warm.
Turn the heat to high and reduce the stock until 2 tablespoons remain. Add the curry powder and stir; then add the heavy cream. Cook the cream mixture for 2 minutes to thicken slightly. When this is done, plate the Couscous Salad, top with a chicken breast and coat each breast with a liberal amount of the cream sauce. Garnish each plate with 2 sprigs of cilantro.
Put the couscous in a medium bowl and pour in the boiling stock. Cover with aluminum foil and let sit for 10 minutes. Uncover and fluff with a fork. Add the remaining ingredients and stir to incorporate. Season, to taste, with salt and pepper.
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