4 pounds lean raw corned beef brisket
3 tablespoons pickling spice (often included with brisket)
1 medium rutabaga, halved and cut into wedges
1 pound large carrots, cut into 4-inch pieces
1 1/4 pounds large fingerling potatoes
1 leek, white and light-green parts only, cut into 3-inch pieces
1/2 head Savoy cabbage, cut into wedges
1/3 cup horseradish, drained
1/3 cup creme fraeche or sour cream