Soak rice noodles in a bowl of room temperature water for 60 minutes. (Small size rice noodles will take 30 minutes.) Drain and cut in half with scissors if they're very long.Tip: If you're short on time, you can quick soak them in hot water for about 3 minutes, then drain and rinse under cold water. Check out this post from Hot Thai Kitchen for more info about cooking rice noodles.
Mix peanut sauce ingredients in a small bowl or cup and set aside.
Heat a large wok over medium heat andadd just enough oil to coat the bottom. Addtofu and cook until sides are golden brown, turning as needed. Transfer to a bowl and toss with 2 tbsp of the peanut sauce.
Add some more oil to the wok over medium heat, then add garlic, cabbage, carrots, and bell pepper. Stir fry until veggies are tender.
Add noodles, tofu, bean sprouts, green onions, and peanut sauce. Toss until all the sauce is absorbed, then taste the noodles for doneness. If they're still a little hard, add a splash of water and continue cooking until tender.
Turn off heat and sprinkle with peanuts to serve, if using.
Notes
1) Some brands of vegetarian oyster sauce contain wheat, so if you are gluten-free, be sure to use a gluten-free vegetarian oyster sauce, or make your own with my recipe using tamari instead of soy sauce.