Combine stock and flour in a small bowl, stirring with a whisk; set aside.
Combine 1 tablespoon oil, rind, 4 teaspoons juice, and garlic powder in a medium bowl, stirring with a whisk. Add chicken; turn to coat. Let stand at room temperature 30 minutes.
Remove chicken from marinade; discard marinade. Sprinkle chicken evenly with salt and pepper. Heat a large skillet over medium-high heat. Coat pan with cooking spray. Add chicken to pan; cook 5 minutes on each side or until done. Remove chicken from pan.
Reduce heat to medium. Add remaining 1 tablespoon oil to pan; swirl to coat. Add shallots, rosemary, and pancetta; cook 3 minutes or until shallots are tender. Add garlic; cook 30 seconds. Add sherry to pan; cook 4 minutes or until liquid almost evaporates, scraping pan to loosen browned bits. Stir in stock mixture; bring to a simmer. Add artichoke hearts to pan; cook 1 minute or until sauce thickens slightly. Stir in remaining 2 teaspoons juice and 2 teaspoons parsley. Add chicken to pan, turning to coat. Sprinkle with remaining 2 teaspoons parsley.
MyRecipes is working with Let's Move!, the Partnership for a Healthier America, and USDA's MyPlate to give anyone looking for healthier options access to a trove of recipes that will help them create healthy, tasty plates. For more information about creating a healthy plate, visit www.choosemyplate.gov.