In a small bowl, toss the pork with the 1/2 tbs balsamic vinegar and a pinch of salt.
Mix all sauce ingredients in another bowl; set aside.
Heat 2 tbs of the oil in a large heavy skillet over medium-high heat. Add the pork and stir fry until pork is nicely browned and cooked through; about 5 minutes. Remove the pork to a plate.
Add the remaining oil to the pan. Add the garlic, pinch of sugar and the carrots. Stir fry for about 3 minutes or until carrots are crisp-tender. Add the green onion and stir fry for an additional 2 minutes.
Add the pork back to the pan along with the snow peas and the sauce. Cook for 3 minutes.