Prep all the veggies as this recipe comes together fast.
Place all the sauce ingredients into a small bowl and whisk well, then set aside.
Cube the tofu and pan fry it in a non-stick pan until lightly browned on all sides. Set aside on a plate.
Cook the noodles according to package directions, drain, rinse with cold water, and set aside.
In a large pot or high-sided frying pan large enough to accommodate all the ingredients, add the bell peppers and red onions, sauté over medium-high heat for approx. 5 to 7 minutes, just to slightly tender stage. Add a splash of water if they start to stick.
Then move the veggies to the side of the pan and add the sauce and cook until it starts to caramelize and thicken (about 3 to 4 minutes), then fold in the peanuts, tofu, and cooked noodles. Gently fold until the mixture thickens and evenly coats all the noodles and peanuts.
Serve immediately.