Step 1

Add the olive oil to a very large pot over low heat and cook the onions until they are deep brown and caramelized, which takes about 30 to 40 minutes.

Step 2

Add the garlic and cook for 3o to 45 seconds or until fragrant.

Step 3

Deglaze with red wine and cook over low to medium heat until the amount of liquid is reduced by one-half, about 5-7 minutes.

Step 4

Place in the sausage and ground sirloin and cook over medium heat until cooked throughout. There should be no pink while stirring often to break up any large chunks.

Step 5

While the meat is cooking, crush the whole peeled tomatoes with your hands to bite-sized pieces.

Step 6

Put in the tomatoes, oregano, and basil and cook over low heat for 30 minutes.

Step 7

Finish by stirring in the cheeses, parsley, and balsamic vinegar and adjusting the seasonings with salt and pepper and sugar, if needed.

Step 8

Lastly, thicken it by stirring in tomato paste until it is to your desired thickness. This is optional.

Step 9

Toss with cooked spaghetti and serve.