In a large bowl, combine the cabbage, carrots, and scallions. Toss to combine.

In a blender, combine the tahini, hemp seeds, nutritional yeast, mustard, lemon juice, garlic, and water. Blend on high until completely smooth. If the dressing is too thick, add more water, 1 tablespoon at a time, until you’ve reached your desired consistency (it should be pourable). Taste and season with salt and pepper.

Pour the dressing over the vegetables and thoroughly toss with tongs until the entire slaw is evenly coated. Taste and adjust seasonings, as needed. Refrigerate in an airtight container until ready to serve.