Preheat the oven to 350°F/180°C. Heat olive oil in an oven-safe skillet over medium-high heat and add the ground beef.
Sauté, breaking up the beef, until no longer pink. Drain excess fat, then add onion and bell peppers and cook for 2–3 minutes.
Add garlic, seasoning, Worcestershire sauce, salt, and pepper; cook for 30 seconds. Stir in diced tomatoes.
Add rice and beef broth. Stir, bring to a boil, then cover with a lid or foil.
Bake for 20–25 minutes, until the rice is tender. If needed, add a splash of water and return it to the oven.
Remove from the oven and sprinkle with cheese.
Broil for 3–5 minutes, until the cheese is melted and bubbly. Garnish with parsley and serve.