In a bowl, mix the tomato concentrate, Marsala and water then set aside.
Over medium heat, in a saucepan with extra virgin olive oil, sautè the garlic. When it turns golden brown, discard it.
Sautè the onion and carrot then toast for about 3 minutes.
Add the meat and cook until cooked through.
Pour the tomato concentrate and the tomato puree then let it boil. When it boils, turn down the heat to low and cover partially.
Simmer for one hour, stirring occasionally.
If the sauce is drying up, add some hot water.
Season with salt and pepper.
While waiting for the sauce to cook, boil the water for the spaghetti.
Over high heat, bring some water to a boil in a tall saucepan. When it boils, put a generous amount of salt. Add the spaghetti and cook following the number of minutes indicated in the package.
When the spaghetti is cooked, mix it with the ragù.
In the individual plates, sprinkle a generous amount of grated Parmesan. Serve the pasta while still hot.