If using dried chickpeas, soak chickpeas the night before (skip if using canned beans).
Cook the chickpeas (skip if using canned beans). Drain soaked chickpeas and add to a medium pot. Cover the chickpeas with water by 2 inches. Bring to a boil, then reduce the heat slightly and simmer for 20 to 25 minutes for firmer beans, 40 to 50 minutes for softer beans
Make the Greek Dressing. Add the ingredients for the dressing to a blender and blend until smooth.
Cook the quinoa: rinse 1 1/3 cup quinoa in a fine mesh sleeve. Transfer the quinoa to a pot and add 2 ⅔ cup water or broth and ¼ t salt. Bring to a boil, then lower heat and simmer uncovered until quinoa is tender, about 15 minutes.
Assemble the bowls with the cooked quinoa, chickpeas, veggies, olives & feta, and top with the Greek Dressing.