Preheat oven to 400 F. Line a baking tray with greased parchment paper.
Toss sweet potatoes, broccoli, olive oil, garlic, and salt in a large bowl,
Transfer the sweet potato and broccoli mix to a baking tray and bake for 20 minutes, turning halfway.
In the meantime, make cilantro tahini dressing.
Place tahini paste, water, lemon juice, and remaining ingredients in a high-speed blender.
Process until smooth and creamy.
In a large bowl, place the sweet potato and broccoli. Drizzle with cilantro tahini dressing and serve!