How to Make It
Bring a large pot of water to a boil over high. Lightly salt boiling water, and add artichokes. Place a heatproof dish on top of artichokes to keep them submerged, and boil until a paring knife can be inserted halfway through stem, about 15 minutes. Remove artichokes, and let drain, stem sides up, until cool enough to handle.
Meanwhile, preheat oven to 325°F. Place sausage, bread cubes, 1/4 cup wine, parsley, garlic, egg yolks, and pepper in a medium bowl. Using your hands, toss until thoroughly combined. (Mixture should have a rustic meatball texture.)
Using paring knife, peel and trim artichoke stems. Carefully loosen leaves in center of artichokes; using a spoon, remove and discard center chokes. Stuff sausage mixture evenly into centers of artichokes.
Place artichokes, stem sides down, in a wide Dutch oven or casserole dish. Arrange potatoes around artichokes; add water to a depth of 1 inch and remaining 3/4 cup wine to Dutch oven. Bring to a simmer over medium-high. Cover and transfer to preheated oven. Bake until potatoes and artichokes are tender and sausage is cooked through (an internal temperature of 160°F), about 55 minutes. Remove from oven, and let stand 10 minutes. Serve artichokes and potatoes with baguette slices and mustard.