In a large deep skillet, over high heat, heat oil until nearly smoking. Place pork in hot pan and let brown, without stirring, about 30 seconds; stir and cook 30 seconds longer. Add carrots, onion, hot peppers and gingerroot to pan, stirring occasionally over highest heat about 6 to 8 minutes, until carrots are crisp tender and onion begins to caramelize. Add one third cup water to pan and scrape loose drippings from bottom. Add fish sauce and stir well until everything is completely coated. Serve over hot noodles or rice.
Note: If serving with noodles, prepare noodles before starting stir fry. Cook according to package directions; drain. Drizzle with a little peanut oil; transfer to a large ovenproof platter. Cover with foil and keep in oven on lowest setting until stir fry is done.