Preheat oven to 400 degrees F.
In a medium bowl, combine the chickpeas, olive oil, cumin, garlic powder, smoked paprika, salt, and tumeric. Stir until chickpeas are well coated. Place on a large baking sheet and roast the chickpeas for 25-30 minutes, or until chickpeas are crispy.
While the chickpeas are roasting, make the lemon tahini dressing. In a small bowl or jar, whisk together the tahini, garlic, lemon juice, and, water. Season with salt and pepper, to taste. If the dressing is too thick, add a little more water and whisk again.
To assemble the bowls, place quinoa, rice, or cauliflower rice in the bottom of a bowl. Top with roasted chickpeas, chopped lettuce, tomatoes, cucumbers, red onion, pita chips, tzatziki sauce, parsley, and feta cheese. Drizzle with lemon tahini dressing. Serve immediately.
Note-you can prepare these bowls in advance. Place ingredients in a container and store in the fridge. Make sure you keep the tzatziki sauce and tahini dressing on the side until ready to serve. Also, leave off the pita chips until ready to eat. Will keep in the fridge for 3-4 days.