Adapted from: Bon Appetit
A lovely addition to your holiday table, this stuffing can be assembled the morning of -- simply chill until you're ready to bake it.
1 pound rustic country-style bread
2 tablespoons extra-virgin olive oil
2 garlic cloves; 1 pressed and 1 minced
4 tablespoons (1/2 stick) butter, divided
1/3 cup pine nuts
2 cups chopped onions
6 cups coarsely chopped stemmed mustard greens
1 tablespoon chopped fresh thyme
2 cups turkey stock or low-salt chicken broth
1/3 cup dried currants
1/2 teaspoon finely grated lemon peel
Position rack in center of oven and preheat to 375° F. Cut bottom crust and short ends off bread and discard. Cut bread into 3/4" cubes; place in large bowl. Whisk oil and pressed garlic clove in small bowl. Add to bread cubes; toss to coat. Spread bread cubes in single layer on large rimmed baking sheet; sprinkle with salt and freshly ground pepper. Bake until slightly crunchy, stirring occasionally, about 15 minutes. Cool slightly, then return to same large bowl.
Generously butter 13 x 9 x 2" glass baking dish. Melt 1 tablespoon butter in heavy large skillet over medium heat. Add pine nuts; stir until golden, about 2 minutes. Add to bowl with bread cubes. Melt remaining 3 tablespoons butter in same skillet over medium-high heat. Add onions; sauté until brown, about 10 minutes. Add mustard greens, thyme, and minced garlic; sauté until greens are wilted and tender, 3 to 4 minutes. Transfer to bowl with bread cubes. Add 2 cups stock to same skillet; boil until reduced to 1 cup, about 5 minutes. Pour stock over bread mixture and toss. Mix in currants and lemon peel. Season with salt and freshly ground black pepper. Transfer stuffing to prepared baking dish.
MAKE AHEAD: Above can be made 6 hours ahead. Cover; chill.
Preheat oven to 350° F. Bake stuffing uncovered until heated through and starting to brown on top, 20 to 30 minutes. Let stand 5 minutes and serve.