In a large skillet, heat olive oil over medium heat. Add the cauliflower rice and sauté for about 5-7 minutes until tender. Season with salt, pepper, chipotle powder, and cumin. Stir well and remove from heat.
In a separate bowl, combine black beans, corn, diced red bell pepper, cherry tomatoes, red onion, and cilantro. Squeeze lime juice over the mixture and toss to combine. Season with salt and pepper to taste.
To assemble the bowls, divide the cauliflower rice among serving bowls. Top with the black bean and corn mixture, sliced avocado, and additional lime juice if desired.
Drizzle with hot sauce for an extra kick, if using. Serve immediately.