Wash spinach thoroughly and prepare it.
Finely chop the onion and garlic.
Heat olive oil in a pan and sauté the garlic and onion.
Add ground beef and cook.
Add tomato sauce and spinach, then bring to a boil.
Simmer the Bolognese sauce until thickened; season with salt and pepper.
Cook the pasta (spaghetti noodles).
Serve the pasta topped with Bolognese sauce.