Preheat oven to 350 degrees Fahrenheit. In a large Dutch oven or cast iron pan, add 6 slices bacon or pancetta sliced, and cook and crumble until crisp. Remove with a slotted spoon.
Add 3 chicken drumsticks and 3 bone-in chicken thighs and sear on each side for 2-3 minutes until golden brown. Remove and set aside on a plate.
Add 1 quartered onion, 4 large sliced carrots, and 3 cloves minced garlic, and cook until almost tender, 3-4 minutes.
Add in 2 tablespoons tomato paste, 2 cups chicken broth, and 1 ½ cups red wine of choice. Bring to a boil and then add the chicken back to the pan. Cover the pan and place it in the oven to braise for 30 minutes.
Remove the pan from the oven and set it on the stove. Carefully remove the lid and take out the chicken, and set it aside.
Take ½ cup of the sauce and whisk it with 3 tablespoons all-purpose flour. Put it back in with the vegetables with 6 ounces sliced mushrooms and bacon, and cook until the sauce has thickened and the mushrooms are tender.
Add the chicken back to the pot and let it simmer until heated throughout.