Preheat oven to 425°F (220°C). A high oven temperature encourages caramelization and browning on the vegetables and chickpeas — that Maillard flavor is what makes roasted veg taste rich and savory.

Prepare the chickpeas: spread the drained and rinsed chickpeas on a clean kitchen towel or layers of paper towel and pat them very dry. Removing surface moisture helps them crisp in the oven instead of steaming; moisture is the enemy of crispness.

Toss chickpeas and vegetables: In a large bowl, combine the dried chickpeas, diced zucchini, chopped red pepper, and diced eggplant (or mushrooms). Add 1 tablespoon olive oil, 1/2 teaspoon kosher salt and 1/4 teaspoon black pepper. Toss to coat in a single layer. Coating with a small amount of oil lets the vegetables brown without becoming greasy; the seasoning deepens as the vegetables reduce and concentrate.

Arrange on a baking sheet: Spread the chickpea-vegetable mixture in a single layer on a rimmed baking sheet. Give each piece a little room — overcrowding traps steam and prevents browning. If your sheet is small, use two pans or roast in batches.

Roast for 20–25 minutes, stirring once halfway through: Roast until the edges are deeply golden and the chickpeas have started to puff and crisp. Stirring once promotes even browning. If you want extra crisp chickpeas, after 25 minutes switch to broil for 1–2 minutes watching closely to avoid burning.

Warm the rice while vegetables roast: If your brown rice is already cooked and cooled, warm it gently in a saucepan with a splash of water over low heat or in the microwave covered for 1–2 minutes. Warm rice contrasts nicely with the roasted veg and helps the dressing coat the grains.

Make the tahini-lemon dressing: In a small bowl whisk together 2 tablespoons tahini, juice and zest of 1 lemon (about 2 tablespoons juice), 1 minced garlic clove, 1 tablespoon olive oil, 1/2 teaspoon kosher salt and 1/4 teaspoon black pepper. Tahini is thick and can seize when it meets citrus — whisking in warm water, 1 tablespoon at a time (2–4 tbsp total), brings it to a silky consistency that will coat the grains and vegetables.

Taste and adjust the dressing: The dressing should be bright, slightly nutty and balanced — add more lemon for brightness, a pinch of sugar or honey (if not vegan) to round acidity, or extra water to thin. Seasoning is key: a little more salt will make the tahini sing.

Assemble the bowls: Divide the warm brown rice between two bowls. Top with the roasted vegetable-chickpea mixture. Drizzle 2–3 tablespoons of the tahini-lemon dressing over each bowl, sprinkle chopped parsley and an extra pinch of black pepper. The layering keeps textures distinct (warm rice, juicy roasted veg, crisp chickpeas) and the dressing ties the flavors together.

Finish and serve: For a restaurant touch, add lemon zest, an extra drizzle of olive oil or a scattering of toasted sesame seeds or crushed red pepper for heat. Serve immediately so the crisp chickpeas keep their texture against the warm rice and tender vegetables.