Cook the Grains: In a medium saucepan, combine the rinsed farro, rinsed quinoa, and 4 cups of water or unsalted broth. Bring to a boil over high heat, then reduce heat to low, cover, and simmer for 20-25 minutes, or until all the liquid is absorbed and the grains are tender. Remove from heat and let stand, covered, for 5 minutes before fluffing with a fork.
Roast the Chickpeas: While the grains cook, preheat your oven to 400°F (200°C). Pat the rinsed chickpeas completely dry with a clean kitchen towel. In a large mixing bowl, whisk together the smoked paprika, cumin, turmeric, garlic powder, cinnamon, and black pepper. Add the dried chickpeas and the olive oil to the bowl, tossing vigorously to ensure every chickpea is evenly coated. Spread the chickpeas in a single layer on a large, rimmed baking sheet. Roast for 25-30 minutes, shaking the pan halfway through, until they are golden brown and audibly crisp.
Prepare the Vegetables: As the chickpeas roast, prepare your fresh components. Chop the cucumber, halve the tomatoes, dice the bell pepper, thinly slice the red onion, and halve the rinsed olives. Roughly chop your fresh parsley and mint.
Make the Tahini Drizzle: In a small bowl, combine the tahini, fresh lemon juice, and grated garlic. Whisk to form a thick paste. Slowly drizzle in the cold water while whisking continuously until the sauce becomes smooth and creamy. You are looking for a pourable, yet rich consistency; add more water by the teaspoon if needed. Stir in the extra virgin olive oil and optional sumac.
Assemble the Bowls: To build the bowls, create a generous bed of the farro and quinoa blend in each of the six bowls. Arrange a portion of the crispy chickpeas alongside the grains. Artfully place distinct sections of cucumber, tomatoes, bell pepper, red onion, and olives around the bowl.
Garnish and Serve: Just before serving, drizzle the Lemon-Garlic Tahini Drizzle generously over the entire bowl. Garnish with the chopped fresh herbs and a sprinkle of toasted sesame seeds.