In a resealable plastic bag combine the soy sauce and cornstarch and mix well. Add beef, cover, and let marinate for 20 minutes in the refrigerator.
Whisk together the sherry, hoisin, honey, chili sauce, soy sauce, and tangerine juice until completely combined.
In large pan or wok, heat oil on high. Add the ginger and beef and cook for 2 to 3 minutes. Then add sauce mixture and cook for another 2 minutes on medium heat until sauce thickens. Serve on warm platter, garnish with scallions, tangerine zest and sesame seeds.