Stage 1: Preheat oven to 425°F (220°C), center rack. In the skillet or baking dish, combine the undrained diced tomatoes, chickpeas, 2 Tbsp extra-virgin olive oil, half the garlic (3 cloves), smoked paprika, 1/2 tsp sea salt, and 1/4 tsp black pepper. Spread evenly.
Stage 2: In a large mixing bowl, toss potatoes, zucchini, red onion, and red bell pepper with the remaining 1/2 tsp sea salt. Let sit 10 minutes.
Stage 3: Without draining, add the remaining 1/3 cup olive oil, remaining garlic, dried oregano, remaining 1/4 tsp black pepper, parsley, and mint. Toss to coat.
Stage 4: Arrange the seasoned vegetables over the chickpea-tomato base in tight, overlapping concentric circles. Pour any residual oil and herb mixture over the top.
Stage 5: Cover tightly with foil and bake 45 minutes.
Stage 6: Uncover and bake 35–40 minutes more, until the vegetables are deeply tender and the edges are caramelized. Rest 10 minutes, then finish with the juice of one lemon.