Preheat your oven to 400°F (204°C) and line a baking sheet with parchment paper.
In a large bowl, combine cauliflower florets and chickpeas. Drizzle with 2 tablespoons of olive oil and toss until evenly coated.
Mix smoked paprika, cumin, chili powder, garlic powder, salt, and black pepper in a small bowl. Sprinkle the spice mix over the cauliflower and chickpeas, tossing to ensure a thorough coating.
Spread the seasoned cauliflower and chickpeas onto the prepared baking sheet in a single layer, ensuring they are not overcrowded.
Roast in the preheated oven for 25 minutes or until the cauliflower is tender and the edges are golden brown, stirring halfway through the cooking time.
While the vegetables are roasting, prepare the salad base by combining arugula, cherry tomatoes, and red onion in a large salad bowl.
In a small bowl, whisk together the remaining 1 tablespoon of olive oil and lime juice to create a simple dressing.
Once the cauliflower and chickpeas are done roasting, let them cool slightly before adding them to the salad base.
Add the diced avocado and fresh cilantro to the salad.
Drizzle the lime and olive oil dressing over the salad and gently toss to combine all the ingredients.
Serve the salad immediately or chill in the refrigerator for a refreshing cold salad option.