Preheat oven to 450º. Chop cauliflower and add to a large mixing bowl. Drain and rinse chickpeas, use a clean towel to dry them a bit. Add them to the baking dish. In a small bowl add all seasonings. Whisk together.
Sprinkle seasoning mix over the cauliflower mix. Drizzle olive oil over it and gently mix everything together with your hands. Using your hands will prevent the chickpeas from breaking apart.
Place the spiced cauliflower on a baking sheet and bake for 30 minutes. Meanwhile, start rice. Chop red bell pepper into bite sized pieces and add to the cauliflower/chickpeas after 20 minutes of cooking (mix the bell pepper in and cook with the veggies for the remaining 10 minutes).
While everything is cooking, prep toppings. Chop tomatoes in half, shred romaine lettuce, chop leftover cucumber and prepare tzatziki sauce
To make tzatziki sauce, add lemon juice, salt/pepper, greek yogurt to a bowl. Use a cheese grater to grate the cucumber an add the flesh and juice to the sauce. Finely chop the cilantro and dill, add to sauce and whisk well.
Once rice and cauliflower mix is finished cooking, add rice to a bowl and top with roasted veggie, fresh toppings, hummus and a generous drizzle of tzatziki sauce. Enjoy!