Preheat the oven to 350°F.
In a food processor, pulse the bread into coarse crumbs. Toss the crumbs in a bowl with the herbs and butter; season with salt and pepper. Spread the crumbs out on a rimmed baking sheet and bake, stirring once, until golden and crispy, about 15 minutes. Set aside.
Bring a large pot of water to a boil for the pasta.
In a large skillet, heat the oil, about 3 turns of the pan, over medium-high heat. Add the celery, onion, garlic and bay leaf; season with salt and pepper. Cook, stirring often until softened, 6-7 minutes. Add the turkey and cook, stirring occasionally and breaking the meat up with a wooden spoon, until lightly browned, about 5 minutes. Add the wine and cook, stirring often, until absorbed, about 2 minutes. Add the stock and reduce heat to low. Let the sauce simmer while the pasta cooks.
In a second large pot, bring the buttermilk to a gentle simmer over medium heat.
Salt the boiling water and add the pasta. Cook for 5 minutes. Drain the pasta then add it to the buttermilk. Simmer the pasta in the buttermilk for 3-4 minutes. Add the turkey sauce and cheese to the pot, and toss to combine.
Serve the pasta in shallow bowls topped with breadcrumbs.
From Rachael Ray Every Day, February 2018