Bring a large pot of water to a boil. Add the soba and cook according to package directions. Drain and rinse and set aside.
Cook the vegetables:
Heat 1 tablespoon neutral oil in a large skillet over medium heat. Add the shallot, white parts of the scallions, and mushrooms. Cook for 5 minutes. Add the eggplant and cook, turning occasionally, for 7–8 minutes until the eggplant and mushrooms brown.
Make the sauce:
Whisk together all of the sauce ingredients as the vegetables cook. Taste and adjust the seasonings to your preference.
Cook the tofu:
Add tofu and season lightly with salt and pepper. Cook for 2 minutes.
Pour the sauce over the tofu and bring to a boil. Reduce the heat to low and toss gently to coat. Simmer for 10 minutes. Taste and season.
Finish the soba:
Add the chopped Thai basil leaves and all but a pinch of the reserved scallion greens to the pot. Add the noodles and toss until evenly coated with the sauce. Turn off the heat.
To serve:
Transfer the soba to a serving platter. Sprinkle the remaining pinch of scallion greens on top, scatter a few Thai basil leaves over the noodles, and finish with a teaspoon or two of Auria’s Vegan Hot Chili Sambal on top. Enjoy!