While your oven preheats to 400°F (200°C), prepare all your fresh vegetables: roughly chop the lettuce into 1-inch ribbons, halve the cherry tomatoes lengthwise, slice the cucumbers into 1/4-inch rounds, dice the bell pepper into 1/2-inch squares, and thinly slice the red onion. Having everything prepped and ready allows you to assemble the bowls quickly once the warm components are done cooking. Place all prepped vegetables in a large bowl or on a cutting board for easy access.
Drain and rinse the canned chickpeas, then pat them completely dry with paper towels—this is essential for achieving a crispy exterior. In a bowl, toss the dried chickpeas with olive oil and all the spices (garlic powder, smoked paprika, onion powder, oregano, salt, and pepper) until evenly coated. Spread them in a single layer on a parchment-lined baking sheet and roast for 20 minutes at 400°F, stirring halfway through to ensure even browning. I find that the smoked paprika really deepens as the chickpeas roast, creating that rich, smoky flavor you can't get any other way.
While the chickpeas are roasting (you can start this immediately after you put them in the oven), bring 1 cup of water to a boil in a pot, then add the dry quinoa. Reduce heat to low, cover, and simmer for 15 minutes until the water is absorbed and the quinoa is tender with visible spirals. Remove from heat and let it sit, covered, for 5 minutes to fluff up. This timing works perfectly so both the chickpeas and quinoa finish around the same time, keeping your workflow efficient.
Divide the prepared lettuce from Step 1 evenly among your serving bowls, creating a bed for the other ingredients. Layer the tomatoes, cucumbers, bell pepper, sliced red onion, and kalamata olives on top of the lettuce. Add a generous portion of the roasted chickpeas from Step 2 and fluffy quinoa from Step 3 to each bowl. Top with a dollop of hummus and a generous handful of crumbled feta cheese. Drizzle the fresh lemon juice over the entire bowl—I always do this at the very end because it brightens all the other flavors without the acidity sitting too long on the vegetables.