Sprinkle both sides of the chicken breast with salt. Melt the butter in a stainless steel skillet over medium heat. Sear on both sides, about 4 minutes on each side. Add the grapefruit juice and zest. Bring to a boil. Reduce the heat to low and simmer, covered for 10 minutes or until the chicken is no longer pink in the center. Transfer the chicken to a plate, cover with aluminum foil and place in a warmed oven until ready to serve.
Add the heavy cream, cream cheese, white wine, white pepper and sugar to the pan. Boil the sauce for 3-4 minutes or until the sauce has thickened slightly. Add salt to taste.Arrange the chicken breasts on a serving platter, or on individual plates, drizzle with the sauce and garnish with fresh slices of pink grapefruit and a few sprigs of fresh parsley.Serve over rice, pasta, or creamy mashed potatoes.