Preheat your oven to 425°F (220°C).
Cut the zucchini into half-moons about ½ inch thick. Place the zucchini, chickpeas, red bell pepper, and onion in a mixing bowl.
Drizzle the olive oil over the vegetables and chickpeas. Sprinkle the garlic powder, smoked paprika, salt, and pepper, and toss everything together until evenly coated.
Spread the mixture in a single layer on a baking sheet.
Roast in the preheated oven for about 20-25 minutes, or until the vegetables are tender and slightly caramelized. Stir halfway through cooking for even roasting.
Once roasted, remove from the oven and let it cool for a few minutes.
In a large bowl, combine the roasted mixture with cherry tomatoes, feta cheese (if using), and lemon juice. Toss gently to mix.
Garnish with fresh parsley before serving.