Preheat the oven to 400°F (205°C) and line 1-2 baking sheets with parchment paper.
Toss the Brussels sprouts, sweet potato, and chickpeas with a bit of olive oil spray and harissa. Spread evenly onto the baking sheet. Cook for 20 to 25 minutes, stirring once halfway through, until tender and starting to brown.
Prepare the dressing by mixing the hummus and the water.
Divide the chickpeas, Brussels sprouts, potatoes, and avocado into each bowl. Top with the hummus dressing and pumpkin seeds. Enjoy!