While the oven is preheating, cook the pasta until al dente, then drain and place in a bowl.
In a large skillet, heat the oil, then add the seitan. Brown the seitan for 3-4 minutes, then add the soy sauce. Combine the browned seitan with the drained pasta, mix it together and set aside.
To prepare the sauce, dissolve the kuzu in 1/2 cup of the water and set it aside. In a saucepan, heat the soymilk, another 1/2 cup water, the tahini, salt and cinnamon over medium heat, stirring constantly until the mixture is almost boiling. Add the dissolved kuzu to the pot and sir this sauce as it thickens. If the sauce gets too thick, add a little more water (no more than 1/2 cup). Adjust the seasonings.
To assemble the casserole, first layer half the pasta-seitan combination in the bottom of the prepared baking dish. Pour half the sauce evenly over the top; add the rest of the pasta and cover with the remaining sauce. Top with a layer of breadcrumbs.
Cover the casserole with foil and bake 15 minutes. Remove the foil and bake another 15 minutes to brown the crust. Serve hot.
posted by Mr Falafel