01 -
Preheat your oven to 375°F (190°C) and lightly grease a 9×13-inch casserole dish.
02 -
Heat a large skillet over medium-high heat. Add the ground beef and cook until browned, breaking it into crumbles as it cooks. If needed, add olive oil to prevent sticking. Stir in the onion, bell pepper (if using), and garlic. Cook for another 3–4 minutes until softened. Season with smoked paprika, oregano, salt, and black pepper.
03 -
Stir the uncooked rice into the beef mixture. Add the beef broth, canned tomatoes (with their juice), and frozen vegetables (if using). Bring the mixture to a gentle boil.
04 -
Transfer the beef and rice mixture to the prepared casserole dish. Cover tightly with foil to prevent drying out. Bake in the preheated oven for 30–35 minutes, or until the rice is tender and the liquid is absorbed.
05 -
In a small bowl, mix the shredded cheddar cheese, panko breadcrumbs, and melted butter. Sprinkle the cheese mixture evenly over the casserole.
06 -
Return the casserole to the oven, uncovered, and bake for an additional 10–12 minutes, or until the cheese is melted and bubbly and the topping is golden brown. Let the casserole cool for 5 minutes before serving.