In a bowl or jar, combine tahini, water, lemon juice, maple syrup, salt, garlic powder, and cayenne.
Whisk the dressing ingredients together, or shake the jar if it has a lid, until smooth. Set aside.
Finely chop the cabbage and broccoli and place them in a large mixing bowl.
Peel and shred the carrot, then slice the green onions.
Add the shredded carrot, sliced green onions, sunflower seeds, and dried cranberries to the bowl with cabbage and broccoli.
Stir the salad mixture to combine all the ingredients evenly.
When ready to serve, drizzle the dressing over the salad.
Toss everything together until the salad is well-coated, using a generous amount of dressing like a coleslaw.