Drain artichokes in a colander over a bowl, reserving liquid. Coarsely chop artichokes.
Combine artichokes, cheese, 2 tablespoons chives, 1 teaspoon thyme, and 1 teaspoon lemon rind in a medium bowl.
Cut a horizontal slit through thickest portion of each chicken breast half to form a pocket. Stuff about 1/4 cup artichoke mixture into pockets.
Sprinkle chicken with pepper.
Heat 1 teaspoon oil in a large nonstick skillet over medium-high heat.
Add 4 breast halves; cook 6 to 8 minutes on each side or until chicken is done.
Remove chicken from pan; keep warm. Repeat with 1 teaspoon oil and 4 chicken breast halves.
Add reserved artichoke liquid, 1/2 teaspoon thyme, and 1/2 teaspoon lemon rind to pan.
Combine lemon juice and cornstarch; add to pan. Bring to a boil; cook 1 minute, stirring constantly. Return chicken to pan. Cover and simmer 2 minutes or until thoroughly heated. Spoon sauce over chicken. Top with 2 tablespoons chives.