Cut away the tail and excess fat from the chicken and butcher it into 2 breast pieces, separate the wings and wing tips, 2 drumsticks, 2 thighs. Leave skin intact; set aside
Place the back, neck, wing tips and other bony bits into your stockpot to make an excellent chicken stock that you will use in this recipe. Find the chicken stock recipe link in notes section; put it all together now and get it simmering on the stove
Over medium high heat, in a heavy deep pot, add the vegetable oil and in a single layer, add the chicken pieces; brown for 3-4 minutes on all sides until crispy golden brown; set aside
Add the diced onion to the chicken fat, reduce heat to medium-high and sauté until the onion has softened and is translucent
Add the red wine, beef stock, tomato paste, garlic slices, shallots and bouquet garni
Return the chicken to the pan, combine all ingredients, and sprinkle with the flour; toss and add the stock until all ingredients are just covered
Bring the stew to a simmer; cover the pot with a tight fitting lid and simmer slowly for 30 to 35 minutes, stirring occasionally to avoid any sticking to the pot (and if it is truly simmering, this should not be a problem)
While simmering, sauté the bacon until golden brown; remove from pan and set aside on paper towel
Add the sliced mushrooms to the same pan and sauté on high heat until golden brown; set aside
In the same pan, add the pearl onions and sauté until caramelized; set aside (this can take a good 20 minutes)
The coq au vin should be just finished simmering; the sauce should have thickened, but still be the consistency of a thin gravy
Fifteen minutes prior to service, add the mushrooms, pearl onions and bacon to the stew; taste and adjust seasonings accordingly
If serving family style, sprinkle with finely chopped parsley and serve immediately; if plating, serve on top of creamy mashed potatoes, garnished with freshly chopped flat leafed parsley sprinkled on top with a side of green peas