Whisk together everything except the oil, green onion, and shrimp.
Marinade shrimp in the sauce for 15 min. Longer if possible. Keep the marinade for later when done***.
Heat a heavy skillet over medium high and add the oil. Pan sear the shrimp in batches, do not overcrowd the pan if you want a nice char on the shrimp.
Let cook on one side for 1~2 minutes, then flip once a golden crust forms.
Right after you flip to the other side, add the marinade you used into the pan. If the pan is hot and you have a wide surface there will be a lot of steam so make sure your kitchen fan is on!
Mix the shrimp with the sauce thoroughly, make sure to pick up all the little charred bits on the surface of the pan for more flavor.
Enjoy! Serve with lime wedges and top with green onion!