Heat the extra virgin olive oil in a large skillet over medium-high heat.
Add the ground beef to the skillet, breaking it into small crumbles with a spatula, and cook until browned and fully cooked through.
Stir in the diced red onion and red bell peppers, sautéing for 3 to 4 minutes until the vegetables are tender-crisp.
Add the chili powder, ground cumin, garlic powder, sea salt, and black pepper to the beef mixture, stirring well to coat.
In a separate small pan or microwave-safe bowl, lightly steam the cauliflower rice and warm the pre-cooked brown rice until heated through.
Assemble the bowl by placing the cauliflower rice and brown rice at the bottom as a base.
Top the rice with the seasoned ground beef and pepper mixture, followed by the black beans and salsa.
Finish the bowl with a dollop of Greek yogurt, sliced avocado, fresh cilantro, and a squeeze of lime juice.