To begin, coat a saute pan with olive oil and bring to medium low heat. Add the onions and a pinch of salt and cook until soft and translucent.
Add the garlic and saute for a couple of minutes. Turn off heat and allow the mixture to cool.
Put the ground beef and sausage in a large bowl and use your hands to combine the meat. It should be well combined, but try not to overmix.
Add the eggs, Parmigiano-Reggiano, parsley, bread crumbs, and water.
Add the onion mixture and season with salt and pepper. Using your hands, mix until combined.
Test the seasoning of the mixture by making a small meatball and tasting it.
Shape the meatballs.
Coat a large, heavy bottomed pot with olive oil and bring to medium-low heat. Brown the meatballs on all sides. Don't be afraid to let them get some color, it adds immense flavor!
Remove the meatballs from the pan and set aside.
Deglaze the pan with red wine, loosening the brown bits with a wooden spoon.
Add the tomato sauce and water.
Season with salt, pepper and dried oregano.
Return the meatballs and juices to the pan. Cover and simmer for two hours over low heat so the flavors can mingle, and you're ready serve!
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