Heat the oil in a large pan over medium heat. Add the seitan and saute until it begins to brown. Add the carrots and broccoli and cook until they begin to soften. Next, add the sauces and bring to a simmer.
In another pot, cook the soba noodles according to package directions.
When the vegetables are al dente, take off heat. Scoop some of the noodles into a bowl and top with the vegetables. Spoon some of the sauce over the top and serve.