Preheat oven to 350°F (175°C). Slice the delicata squash, remove seeds, and toss with olive oil, salt, pepper, and garlic powder. Spread the squash on parchment paper on a baking sheet and roast for about 40 minutes, or until tender and slightly caramelized. While the squash roasts, prepare a bed of spinach in a bowl. Top the spinach with sliced avocado, chickpeas, roasted delicata squash, and walnuts. Drizzle with tahini before serving.
