Preheat oven to 350°F. Bring a large pot of water to a rolling boil and season with Salt to taste like the sea. Blanch the Cabbage until tender and bright green, about 5 minutes. Shock in ice water and set aside to dry. Remove leaves.
For the sauce
In a large sauté pan, add a few tablespoons of Olive Oil over medium-high heat. Add Pancetta and cook until the fat renders out and the Pancetta Crisps. Add the Onion, Garlic, Crushed Red Pepper Flakes and cook until fragrant. Add a teaspoon of Dried Thyme and Dried Basil. Add the Tomatoes and a generous pinch of Salt. Simmer until it comes together, about 5 minutes, and then set aside.
For the filling
In a large bowl, combine the Ground Beef, Sausage, Pecorino, Parsley, Currants, a teaspoon of Dried Basil and Thyme, Breadcrumbs, and Egg. Season generously with Salt and Freshly Ground Pepper. Using your hands, mix until just combined.
In a baking dish lightly greased with Olive Oil, ladle a thin layer of sauce. Spoon some of the filling into each of the leaves of Cabbage, and roll up. Arrange over the Arrabiata sauce in the baking dish. Once full, ladle more of the Arrabiata sauce over the stuffed Cabbage and sprinkle with more Pecorino-Romano. Transfer to oven and bake for an hour to an hour and a half, until the filling is completely cooked through. Serve.