Preheat the oven to 350 degrees F.
Coat a large saute pan with olive oil, add the onions and bring to a medium-high heat. Season the onions generously with salt and cook for about 5 to 7 minutes. The onions should be very soft and aromatic but have no color. Add the garlic and the crushed red pepper and saute for another 1 to 2 minutes. Turn off heat and allow to cool.
In a large bowl combine the meats, eggs, Parmigiano, parsley and bread crumbs. It works well to squish the mixture with your hands. Add the onion mixture and season generously with salt and squish some more. Add the water and do 1 final really good squish. The mixture should be quite wet. Add a little more salt.
Shape the meat into desired size. Some people like 'em big some people like 'em small. I prefer meatballs slightly larger than a golf ball. Place them on a cookie sheet and bake them in the preheated oven for about 20 minutes or until the meatballs are cooked all the way through.