Potatoes: Preheat oven to 400°F (204°C). Cut 2 medium sweet potatoes in half, lengthwise. Rub with half of the oil and place face down on a large rimmed baking sheet.
Chickpeas: Stir to combine 1 15-oz can chickpeas (drained) with remaining oil, ½ tsp each cumin, cinnamon, smoked paprika, garlic powder, and ¼ tsp salt. Spread onto the same baking sheet as the potatoes.
Bake: 25 minutes, or until potatoes are fork tender and chickpeas are crisp.
Sauce: Stir to combine ½ cup hummus, 1 Tbsp lemon juice, 1 tsp dried dill, 1 clove garlic (minced), and water to thin into a sauce consistency.
Serve: Use a knife to slightly open each potato half. Spoon in chickpeas and ¼ cup finely diced tomato, drizzle with sauce, and garnish with ¼ cup chopped fresh parsley.