Cook Lo Mien noodles according to package instructions. Drain.

While noodles are cooking, toss the pork with 1/2 tbsp. vinegar in a bowl.

In another bowl, mix the remaining 2 tbsp. vinegar, soy sauce, cornstarch, ketchup, sugar, and water in another bowl.

Heat 2 tbsp. oil in a large, heavy skillet or wok over medium-high heat. Add the pork. Stir until pork is almost opaque, about 2 minutes. Transfer pork back to the bowl. Wipe out skillet.

Heat the remaining oil in same skillet. Add garlic and stir for 15 seconds. Add carrots and onions, stir-frying until crisp-tender, about 2 minutes.

Add the pork, snow peas and the soy sauce mixture to the skillet. Stir-fry until the pork is cooked through and the sauce thickens, about 3 minutes.

Serve over hot noodles.