Cajun Chicken Salad with Green Grapes

1 bay leaf

1/2 teaspoon(s) whole black peppercorns

1/2 teaspoon(s) dried thyme

6 medium (1 3/4 pounds) skinless, boneless chicken-breast halves

3/4 teaspoon(s) paprika

1/3 cup(s) light mayonnaise

1/3 cup(s) reduced-fat sour cream

3/4 teaspoon(s) salt

1/4 teaspoon(s) coarsely ground black pepper

1/8 teaspoon(s) ground nutmeg

3. cup(s) (about 12 ounces) green grapes , each cut in half

1 large red pepper , cut into 1/2-inch dice

1/2 cup(s) (loosely packed) fresh parsley leaves , chopped

1/4 cup(s) thinly sliced red onion

1 large pickled jalapeño chile , minced