Pre-heat your oven to 425 F. Put the fries on a silicone mat or parchment paper. Sprinkle with a little salt, and bake for 35 minutes, or until cooked through. *For this recipe, Ema bought fries from the market that had been pre-cooked so that is an option as well.
Once the fries are done, heat a wok or deep skillet on medium and add the oil. Add the potatoes and sweet potatoes to the skillet and toss to coat with oil, then add the green onion, garlic, salt and pepper.
Toss all ingredients for 2-3 minutes, then remove from heat and serve.