1Mix thyme, salt and pepper; sprinkle over chicken and set aside.
2In 12-inch skillet, heat butter and oil over medium heat. Cook garlic in butter mixture 1 to 2 minutes, stirring frequently. Add chicken. Cook uncovered 8 to 12 minutes, turning once, until light golden brown.
3Stir in frozen vegetables. Cover; cook 6 to 8 minutes, stirring occasionally, until vegetables are hot and crisp-tender and juice of chicken is clear when center of thickest part is cut (170°F).