Heat olive oil in a large skillet over medium-high heat.
Season chicken with salt and pepper, then cook until golden brown and internal temperature reaches 165F (74C), approximately 8-10 minutes.
In a small bowl, whisk together Greek yogurt and ranch seasoning to create the high-protein dressing.
In four individual meal prep containers or bowls, distribute 1/2 cup of cooked brown rice.
Layer chicken, black beans, corn, and red onion over the rice base.
Drizzle each bowl with 1 tablespoon of BBQ sauce and 2 tablespoons of the Greek yogurt ranch dressing.
Garnish with fresh cilantro before serving.