Roast the sweet potatoes at 400 °F for 1 hour until tender. Slice in half.
Crisp the chickpeas with sesame oil, garlic powder, salt, and ginger for 30 minutes, stirring every 10.
Whisk the tahini sauce with fresh ginger, garlic, vinegar, and water until smooth.
Mix the sriracha glaze with sriracha and ½ tablespoon water.
Assemble: drizzle tahini over sweet potatoes, top with chickpeas, glaze, green onions, and sesame seeds.