Preheat your oven to 375°F (190°C) and spray your casserole dish with some olive oil.
In a large skillet over medium-high heat, brown the ground beef with salt, pepper, garlic powder, and Italian herbs.
Stir in the marinara sauce and cook for an additional 2-3 minutes.
Transfer the ground beef mixture to the prepared baking dish, spreading it evenly.
Sprinkle the shredded cheddar cheese on top of the beef mixture.
Bake the casserole for 20-25 minutes, or until bubbly and golden brown.
Let it stand for a few minutes before serving to allow the flavors to blend together.
