Heat the olive oil in a skillet over medium heat. Add the Italian sausage and cook until browned, about 5-7 minutes, breaking it apart with a spatula.

Add the sliced bell peppers, onion, and minced garlic to the skillet. Sauté until the vegetables are tender, about 8-10 minutes.

Stir in the oregano, salt, and black pepper. Cook for an additional 2-3 minutes to combine the flavors.

Serve hot, either on its own or with crusty bread, pasta, or rice.