Heat the oven to 200C (400F) and prepare a baking sheet with parchment paper.
Toss the drained chickpeas in olive oil and season with garlic powder, smoked paprika, onion powder, dried oregano, salt, and pepper.
Arrange the chickpeas on the baking sheet in a single layer and roast for 20 minutes, stirring once halfway through; then set aside.
Rinse the quinoa and combine it with water in a saucepan; bring to a boil, reduce to simmer, cover, and cook for about 15 minutes until the water is absorbed.
Fluff the cooked quinoa with a fork and keep aside.
Divide the chopped lettuce among four bowls.
Add the halved cherry tomatoes, diced cucumbers, diced bell pepper, sliced red onion, and pitted kalamata olives in sections over the lettuce.
Place the roasted chickpeas and cooked quinoa in separate parts of each bowl.
Spoon hummus into the center of each bowl and sprinkle crumbled feta cheese on top.