Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a mixing bowl, combine the drained chickpeas, olive oil, smoked paprika, garlic powder, sea salt, and black pepper. Toss until chickpeas are well-coated.
Spread the chickpeas evenly on the prepared baking sheet and roast in the oven for 20 minutes, stirring halfway through, until they are crispy and golden.
While the chickpeas are roasting, prepare the vegetables. In the same mixing bowl, combine the diced zucchini, red bell pepper, yellow bell pepper, and red onion. Drizzle with olive oil and season with salt and pepper. Toss to combine.
After the chickpeas have roasted for 10 minutes, add the seasoned vegetables to the baking sheet. Continue roasting everything for an additional 15 minutes, until the veggies are tender and slightly caramelized.
In a small bowl, whisk together the lemon juice, Dijon mustard (if using), a pinch of salt, and pepper to make the dressing.
To assemble the bowls, start with a base of fresh spinach. Top with the roasted chickpeas and veggies, and drizzle with the lemon dressing.
Garnish with fresh chopped parsley before serving.