Place orange juice and 2 tablespoons thyme in an 8-in. square baking dish; add chicken. Refrigerate, covered, 30 minutes., Remove chicken from orange juice mixture; pat chicken dry. Reserve 1/3 cup marinade; discard remaining marinade., In a large skillet, heat butter over medium-high heat. Add chicken; sprinkle with salt and pepper. Cook chicken 2-3 minutes on each side or until lightly browned. Using tongs, remove chicken from pan, reserving butter in pan., Stir in flour until blended. Cook 30-45 seconds, stirring to loosen browned bits from pan. Gradually stir in broth and reserved marinade. Bring to a boil, stirring constantly; cook and stir 1-2 minutes or until thickened., Stir in green onions, roasted garlic, orange zest and remaining minced thyme. Return chicken to pan; reduce heat to medium-low. Cook, covered, 4-5 minutes or until a thermometer inserted in chicken reads 165°. If desired, serve with orange slices and thyme sprigs.