Cook the quinoa
Rinse 1 cup quinoa under cold water, then cook it with 2 cups of water (or follow package instructions). Bring to a boil, lower the heat, cover, and simmer for about 15 minutes until the water absorbs. Fluff with a fork and cool to room temperature. Cooling prevents wilted veggies.
Prep the veg & chickpeas
While the quinoa cooks, chop the tomatoes, cucumber, red onion, and slice the olives. Rinse and drain the chickpeas, then blot them dry with a towel if you prefer added texture. Dry chickpeas resist becoming soggy in the salad.
Combine & dress
Place quinoa, chickpeas, tomatoes, cucumber, red onion, olives, and parsley in a large mixing bowl. Drizzle 1 tablespoon lemon juice, add salt and black pepper, and toss well. Taste and adjust — you might want a splash more lemon for brightness.
Serve
Divide the salad into four bowls. Garnish with a sprinkle of chopped parsley or a spoonful of vegan feta. Enjoy immediately or chill for later.