- Cut chicken into thin narrow strips. Combine with 1 teaspoon stir-fry sauce.
- Heat 1 Tbsp. oil in hot wok or large skillet over medium-high heat. Add chicken and stir-fry 2 minutes; remove.
- Heat remaining 2 Tbsp. oil in same pan. Add onion and garlic; stir-fry 2 minutes. Add carrots and celery; stir-fry 2 minutes longer.
- Combine 1/4-cup stir-fry sauce with 1 Tbsp. water; add to pan with chicken and sesame seed. Cook, stirring, until chicken and vegetables are coated with sauce. Remove from heat; stir in sesame oil.