Chicken can make a delicious taco filling, but boneless, skinless chicken breasts can lack flavor bling. Chipotle chilies canned in adobo sauce adds both flavor and aroma to the poaching liquid. Chipotles are smoked, dried jalapeno chilies and they add an enticing rich smokiness. More add-ins heighten flavor, too, including garlic, orange juice and Worchester sauce, plus a smidgen of…