Place the first 7 ingredients in a large bowl (only one tablespoon of the oil) and stir to combine.
Add shrimp and marinade for 30 minutes on the counter or covered and refrigerated for an hour.
Place a large wok or sauté pan over medium high heat and add the remaining oil. Using a slotted spoon add the shrimp and saute for 4-5 minutes stirring once until turning pink.
Remove the shrimp to a bowl.
Add the remaining soy sauce mixture and scallions to the pan and boil over high heat for 2 minutes or until mixture thickens.
Pour the sauce over the shrimp and sprinkle with sesame seeds.