How to Make It
Preheat the oven to 350°. In a large saucepan, toast the wheat berries over moderate heat, stirring constantly, until fragrant, 5 minutes. Add 6 cups of water and bring to a boil. Remove from the heat, cover and let sit off the heat for 1 hour.
Meanwhile, arrange the pancetta slices in a single layer on a rimmed baking sheet. Bake for 20 minutes, until browned and crisp. Using tongs, transfer the pancetta to a plate to cool, shaking the slices to release excess fat onto the baking sheet.
Toss the apples with the pancetta fat and arrange them on the baking sheet in a single layer. Bake the apples for about 1 1/2 hours, turning once, until tender.
Meanwhile, drain the wheat berries. Heat the olive oil in the saucepan. Add the shallots and garlic and cook over moderate heat, stirring, until softened, about 3 minutes. Add the wheat berries and remaining 6 cups of water and bring to a boil. Reduce the heat to low, cover and simmer until the wheat berries are tender, about 45 minutes.
While the wheat berries simmer, boil the apple cider and cider vinegar in a large saucepan over high heat until reduced to a syrup, about 15 minutes. Remove from the heat and swirl in the butter.
Drain the wheat berries and transfer to a bowl. Toss with the reduced apple cider. Chop the pancetta and fold it in along with the apples. Season with salt and pepper, garnish with the parsley and serve.