Preheat the oven to 350F and toss the sliced portobellos with chipotle pepper, balsamic vinegar, and soy sauce. Season lightly with salt and pepper. Roast for 20-30 minutes. Set aside.
Place cauliflower florets into food processor with blade. Pulse into it forms into rice-like bits.
Sauté "riced" cauliflower with lime juice and a bit of cilantro. Season with salt and pepper.
To serve, warm up the portobellos as well as the beans.
Place lime-infused cauliflower in a bowl and top with roast portobellos, black beans, sliced avocados, salsa, and a sprinkling of fresh cilantro.