Chicken with Artichoke Pan Sauce

Ingredients

• lower-sodium chicken stock
• tablespoons all-purpose flour
• tablespoons olive oil, divided
• teaspoons grated lemon rind
• tablespoons fresh lemon juice, divided
• teaspoon garlic powder
• skinless, boneless chicken breast halves
• teaspoon kosher salt
• teaspoon freshly ground black pepper
• Cooking spray
• thinly sliced shallots
• tablespoon chopped fresh rosemary
• ounces pancetta, finely chopped
• tablespoon chopped garlic
• dry sherry
• frozen artichoke hearts, thawed and halved
• teaspoons chopped fresh flat-leaf parsley, divided