Heat olive oil in a large skillet over medium heat. Add chopped onion and sauté until translucent, about 5 minutes. Stir in minced garlic and cook until fragrant, about 1 minute.

Sprinkle ground cumin and chili powder into the skillet over medium heat. Stir continuously for about 1 minute, ensuring the spices are evenly distributed and their fragrance becomes noticeable. This step helps to deepen the overall flavor profile of the dish, making it more aromatic and inviting.

Add the rice to the pan, stirring continuously over medium heat for about 3 minutes. Ensure each grain is evenly coated with the spice mixture. This process allows the rice to begin absorbing the spices, enhancing its flavor profile and ensuring a uniform taste throughout the dish.

Add the chicken broth to the skillet and bring it to a gentle simmer over medium heat. Once simmering, cover the skillet with a lid, reduce the heat to low, and cook for 15 minutes. The rice should absorb the broth and become tender, with a fluffy texture.

Add the drained black beans, diced tomatoes with their juices, and frozen corn to the skillet over medium heat. Stir gently to ensure all ingredients are evenly mixed. Cook for 5-7 minutes, allowing the mixture to heat through and the flavors to meld, stirring occasionally to prevent sticking.

Season the mixture with salt and freshly ground black pepper. Taste and adjust seasoning as needed, ensuring a balanced flavor profile.

Cover the skillet once more and continue cooking over medium heat for an additional 5 minutes. This allows the ingredients to blend thoroughly, the corn to become tender, and the mixture to reach a uniform temperature. Stir occasionally to prevent sticking and ensure even heating throughout the dish.

Take the skillet off the heat and keep it covered for 5 minutes. This resting time allows the rice to complete its cooking process, absorbing any remaining liquid and ensuring a tender texture. The steam trapped inside will help achieve the desired consistency without overcooking.

Gently fluff the rice mixture using a fork, making sure to break up any clumps. Ensure the black beans and frozen corn are evenly distributed throughout the dish. This will help achieve a uniform texture and ensure that each bite contains a balanced mix of ingredients.

Serve the dish warm, garnished with fresh cilantro or lime wedges if desired, adding a fresh contrast to the hearty base.