Roast the spaghetti squash (follow these instructions if you're new to roasting spaghetti squash).
When the spaghetti squash is almost finished roasting, saute the vegetables and prepare the creamy tahini sauce (instructions below). To do so, heat the avocado oil in a large cast iron skillet (or skillet of choice) over medium heat. Add the broccoli, stir, and cover. Cook until broccoli turns bright green and begins to soften, about 3 minutes.
Add the zucchini, stir, and cover again. Cook until zucchini has softened but is still al dente, about 2 to 3 minutes. Add the kale leaves, stir, and cover. Cook until kale has wilted, about 1 to 2 minutes.
Once the spaghetti squash has finished roasting, allow it to cool enough to handle, then use a fork to release the "spaghetti" strands. Add the spaghetti squash to the skillet with the vegetables, along with your desired amount of sauce. Stir everything well to combine and continue cooking until any excess water has burned off. Taste for flavor and season with sea salt.
Serve creamy tahini spaghetti squash with roasted pumpkin seeds.
Add all ingredients for the sauce to a small blender and blend until combined. Set aside until ready to use. The sauce will thicken as it sits, so if necessary, add some water to thin it out before using it.