In a small sauce pan, combine wine, salt, peppercorns, juice of 1/2 lemon and coriander seeds. Add the chicken breast and enough water to cover. Bring to a boil, reduce the heat and simmer for 15 minutes. Turn off the heat and allow to cool for 15 minutes. Meanwhile, make the dressing. In a bowl combine mayonnaise, sour cream, curry powder, shallots, honey, vinegar, lime juice, and season with salt and pepper. Slice the papaya and mango into wedges and squeeze the juice from the remaining lemon half. In a small bowl toss watercress with just enough dressing to coat the greens. Divide onto two entree plates. Arrange the papaya and mango on top of the greens and around the border of both plates. Remove chicken from the liquid and pat dry. Remove each breast from the bone and slice into 6 slices. Toss chicken with 2 tablespoons of dressing. Arrange atop the greens. Garnish with lime slices and chopped cilantro. Drizzle with additional dressing