Preheat your oven to 400°F (200°C). Cut the spaghetti squash in half lengthwise and remove the seeds. Brush the inside of each half with 1 tablespoon of avocado oil and season with salt. Place the squash cut-side down on a baking sheet and roast for 30-40 minutes, or until the flesh is easily pierced with a fork.
While the squash is roasting, prepare the sauce. In a small bowl, whisk together tamari, rice vinegar, peanut butter, erythritol, ground ginger, and red pepper flakes until well combined. Set aside.
Heat the remaining tablespoon of avocado oil in a large skillet over medium heat. Add the tofu cubes and cook until golden brown on all sides, about 10 minutes. Remove the tofu from the skillet and set aside.
In the same skillet, add the julienned carrot and sliced red bell pepper. Sauté for about 5 minutes, or until the vegetables are tender-crisp.
Once the spaghetti squash is cooked and cool enough to handle, use a fork to scrape out the strands into a large bowl. It should resemble spaghetti.
Add the cooked tofu, sautéed vegetables, and prepared sauce to the bowl with the spaghetti squash. Toss gently until everything is well coated with the sauce.
Garnish the Vegan Keto Spaghetti Squash Pad Thai with chopped green onions, crushed peanuts, and fresh cilantro. Serve with lime wedges on the side.