In a large skillet, heat the olive oil over medium-high heat. Add the sliced flank steak, season with chili powder, cumin, garlic powder, salt, and pepper. Cook for about 5-7 minutes, or until the steak is browned and cooked to your desired doneness. Remove from heat and set aside.
In a separate pot, warm the queso cheese sauce over low heat until smooth. Stir occasionally to prevent sticking.
In a large bowl, combine the cooked rice, black beans, corn, and diced tomatoes. Mix well to combine all ingredients.
To assemble the bowls, start by placing a generous scoop of the rice mixture at the bottom of each serving bowl. Top with the cooked steak, followed by a drizzle of warm queso cheese sauce.
Finish each bowl with diced avocado, a sprinkle of fresh cilantro, and a lime wedge on the side for squeezing over the top.
Serve immediately and enjoy your delicious Steak Queso Rice Bowl!