I start by preheating the oven to 350°F and lining a baking tray. I mix the egg, parsley, garlic, oregano, tomato paste, water, salt, and pepper in a large bowl. Then I gently combine the ground beef, pork, bread crumbs, and Parmigiano-Reggiano, forming golf ball-sized meatballs. Baking them for 10 minutes, flipping, and baking another 10 minutes ensures they’re golden and slightly firm.
In a large skillet, I melt butter over medium heat and sauté diced onions until soft, then add minced garlic for one more minute. Pouring in marinara sauce, I let it simmer gently, adding sugar and seasoning to taste. Then, heavy cream joins the mix, followed by a flour-water slurry to thicken, creating a silky and luscious sauce.
I add the spaghetti directly into the sauce, letting it cook for about 5 minutes so each strand absorbs the creamy flavors. Then, I gently fold in the baked meatballs, coating them fully. Finally, I serve it hot, topping with extra freshly grated Parmigiano-Reggiano for that irresistible finishing touch.