Preheat oven to 325˚F
Heat the butter in a large skillet over medium-high heat. Add mushrooms. Sauté until soften and they give off liquid. Stir until liquid evaporates
Stir in ½ cup of dry red wine. When wine is almost evaporated, remove from heat and set aside in a bowl. Wipe out pan.
Combine Dredge ingredients and dredge chicken.
Brown chicken in 2T butter and 2T olive oil in batches. Remove the chicken and set aside.
Sauté the pancetta or bacon unit browned. Add the onion, fennel and cook until onion softens and the fennel begins to brown. Stir in garlic and cook for 3 more minutes.
Increase to high and stir in wine and sage. Cook for two minutes
Return the mushrooms and the chicken to the pan and cover tightly. Place into oven for 40 minutes.
Remove from oven and stir in balsamic vinegar.
Cook the pappardelle according to the package instructions. Drain and serve immediately with chicken and mushroom sauce.