Combine sauce ingredients in small bowl; set aside.
Heat a large skillet or wok over medium-high heat; swirl 1 tablespoon (15 mL) oil around the pan.
Add beef, ginger and garlic; stir-fry just until pink on the surface disappears; remove.
Add remaining remaining 1 tablespoon (15 mL) oil to pan; stir-fry carrots 1 minute; add 1/4 cup (50 mL) water. Cover and steam 2 to 3 minutes or until color brightens.
Add celery and stir-fry 1 to 2 minutes or until color brightens; push ingredients to outside of pan.
Stir sauce mixture and pour into middle of pan; add beef. Bring to a boil, stirring constantly. Boil 1 minute until thickened.
Stir in green onion, optional.
Serve over cooked rice.