Heat olive oil in a large skillet over medium heat.
Add diced onion and bell pepper, cook until softened.
Stir in minced garlic and cook briefly until fragrant.
Add ground beef and cook until browned, breaking it apart as it cooks.
Season with Cajun seasoning, paprika, salt, and black pepper.
Stir in the cooked rice and mix well until everything is combined and heated through.
Top with sliced green onions and serve warm.