To poach the chicken, bring a deep frying pan of water to the boil. Add the garlic, shallots, bay leaf and soy sauce and then the chicken breasts. Cover with the lid, reduce heat and simmer for 10 minutes. Remove the pan from the heat and let the chicken breasts completely cool in the poaching liquor.
Meanwhile, combine ingredients for the dressing in a small bowl and set aside.
To assemble the salad, add all remaining ingredients to a large salad bowl. Slice the cooled poached chicken and arrange on top. Drizzle over dressing just before serving.