Directions:
Melt the butter in a large skillet over medium heat. Add the onions, shallots, leeks, carrots, celery, thyme and garlic and season to taste with salt and pepper. Cover and cook until the vegetables are soft and just beginning to color, stirring occasionally, about 15 minutes.
Meanwhile, combine the breadcrumbs and yogurt in a large bowl.
When the vegetables are done, scrape them and any juices into the bowl. Add the beef, veal, ham, sausages, livers (if using), chard, eggs, 2 teaspoons salt and 1 teaspoon pepper. Using a wooden spoon or, better still, your hands, mix the mixture until well blended. (You should have about 8 cups filling.) Fry up a small patty, taste and adjust the seasonings. Set aside in the refrigerator while you prepare the cabbage.
Bring a large pot of lightly salted water to a boil. Cut an angled circle around the core of the cabbage and remove the core. Discard any outer leaves that are browned or damaged. Peel off the leaves one at a time until you get to the heart. Drop the heart into the boiling water, add several individual leaves to the pot and blanch until the leaves are soft and pliable, 2 to 3 minutes. Remove the individual leaves and drain, then continue until all the leaves are blanched. Remove the heart, which should now be fully cooked. Finely chop the cabbage heart and mix it into the stuffing.
Preheat the oven to 350°F.
To assemble the stuffed cabbage, generously butter a 4-quart deep stainless steel bowl or rounded casserole (it should be 8 to 9 inches in diameter). Arrange the bay leaves in a four-leaf-clover pattern in the bottom of the bowl. Arrange the 3 or 4 largest cabbage leaves, overlapping, so that they line the bowl, with the core ends at the rim of the bowl. Spoon in enough stuffing to cover the lower third of the leaves. Lay more cabbage leaves over the stuffing, ensuring that the leaves totally cover the sides of the bowl and then place more stuffing over the new layer of leaves. Continue the layering process until the stuffing is used up and/or you are within 1/2 inch of the rim of the bowl. Fold in any cabbage leaves overhanging the edges of the bowl, then cover the top of the stuffing with enough overlapping cabbage leaves to seal in the stuffing, tucking the leaves down the sides of the bowl. Lay the strips of bacon on top of the cabbage in a pinwheel pattern.
Combine 2 cups of the stock and the white wine and pour enough of this mixture down the sides of the bowl to come to about an inch from the top of the cabbage, adding more stock if needed. (At this point, you can cover and refrigerate the cabbage overnight. You will need to add 20 minutes to the baking time.)
Heat the bowl over medium heat until the liquid begins to simmer. Remove from the heat, lay a circle of parchment paper over the cabbage and seal the bowl with aluminum foil. Place the bowl in a baking pan in case any juices spill over. Bake for 2 to 2 1/2 hours, making sure the liquid maintains a simmer; adjust the oven temperature if the heat is too low or too intense. Baste the top of the cabbage with the liquid from time to time and add more stock if needed so that the liquid remains at least halfway up the sides of the bowl. The cabbage is done when the internal temperature reaches 160°F.
To make the sauce, remove the foil and parchment from the cabbage. Handling the bowl with oven mitts or pot holders, pour all the braising liquid into a saucepan and set the cabbage aside to rest for 15 to 20 minutes. Degrease the surface of the liquid. You should have at least 2 cups. If not, add more stock. Stir in the tomatoes, bring to a simmer, and cook for 5 minutes. Remove from the heat, then add the thyme and crème fraîche (if using).
To unmold the cabbage, remove the bacon, chop it and add to the sauce. Drain any additional liquid into the sauce. Place a large deep platter upside down over the bowl and flip the bowl over to unmold the cabbage. Pour any liquid from the platter into the sauce. Cut the cabbage into wedges with a sharp knife and serve with the sauce on the side.
