1. Preheat your oven to 375°F (190°C).
2. In a large skillet, heat the olive oil over medium heat. Add the onions and garlic and sauté until they are soft and fragrant.
3. Add the ground beef to the skillet, breaking it up with a spoon as it cooks. Cook until the beef is browned.
4. Stir in the Italian seasoning, salt, and pepper.
5. Pour the marinara sauce into the skillet and stir to combine.
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