Rinse the long-grain rice under cold water until the water runs clear to remove excess starch.
Set aside.
In a large pot, heat the olive oil over medium heat.
Add the ground beef and cook until browned, breaking it apart with a spoon.
Drain excess fat if necessary.
Add the diced onion, bell pepper, and minced garlic to the cooked beef.
Sauté until the vegetables are softened and the garlic is fragrant.
Add the rice to the pot and stir to combine with the beef and vegetables.
Pour in chicken broth and season with salt, black pepper, and cayenne pepper.
Bring the mixture to a boil, then cover and reduce the heat to a low simmer.
Cook for about 18-20 minutes or until the rice is tender and the liquid is absorbed.