Heat oil in 12-inch nonstick skillet over moderately high heat until hot but not smoking, then stir-fry garlic, ginger and red pepper flakes until fragrant, about 1 minute. Add sugar snaps and snow peas and stir-fry until crisp-tender, about 3 minutes. Add frozen peas and stir-fry until hot, about 2 minutes. Remove from heat, then stir in soy sauce and sesame oil.
To serve, sprinkle with sesame seeds and salt.
Notes
If preparing this recipe as GLUTEN FREE, just make sure that you are using a brand of soy sauce that is designated as GF.