Brown that beef: Heat your skillet over medium-high heat and add the olive oil and ground beef. Break it up as it cooks and season with salt and pepper.
Veggie time: Once the beef is browned, toss in the chopped onions, bell peppers, and minced garlic. Let them sauté until they're soft and fragrant, about 3-4 minutes.
Spice it up: Add the paprika and oregano, stirring to combine.
Rice is nice: Add your rice to the skillet, stirring to coat it with the beef and veggie mixture.
Liquid magic: Pour in the beef broth and diced tomatoes. Bring everything to a boil, then reduce the heat and let it simmer.
Patience pays off: Cover the skillet and let it simmer for about 18-20 minutes, or until the rice is tender and has absorbed most of the liquid.
Final touches: Fluff the rice, taste for seasoning, and adjust if needed. If using, sprinkle cheese on top and let it melt before serving.