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To make potatoes: Preheat oven to 375 degrees.
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Place a roasting pan in the oven for 5 minutes to preheat.
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In a mixing bowl, combine the potatoes, garlic, and olive oil and stir to coat the potatoes and garlic.
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Season generously with salt and pepper.
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Transfer to the roasting pan and roast, stirring occasionally until potatoes are soft when pierced with the tip of a knife and the garlic cloves are very soft and sweet in flavor, about 40 minutes.
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Remove from oven and keep warm.
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7
To make mushrooms: In a 12-inch saute pan, heat the butter over medium heat.
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Add the shallots and cook for about 3 minutes, until softened.
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Add the garlic and cook about 1 minute longer.
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Add the mushrooms and thyme.
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Cover the pan and cook for 7 to 10 minutes, until the mushrooms are tender and have released their juices.
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If the mushrooms seem dry during cooking, add about 1/4 cup of the chicken stock.
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When the mushrooms are soft, add the rest of the chicken stock, raise the heat to high, and cook until the liquid is reduced by half, about 6 minutes.
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There will be quite a bit of liquid in the mushrooms.
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Remove them from the heat, cover, and set side to keep warm.
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To make the chicken:
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Heat the oil and 1 tablespoon of the butter in a 12-inch saute pan over medium-high heat.
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Season the chicken breasts with salt and pepper.
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Place the chicken breasts in the pan, skin side down.
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Cook for about 6 minutes, until golden brown.
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Turn and cook until the juices run clear when pierced with the tip of a knife, about 6 more minutes.
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Add the rosemary and cook, basting frequently, for 6 to 8 minutes longer, until the chicken is cooked through and nicely browned.
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Transfer to a serving platter and set it aside, covered, to keep warm.
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24
Pour off any oil in the pan and add the wine and Cognac.
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25
Raise the heat to high and deglaze the pan by scraping up any browned bits with a wooden spoon.
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26
Add the stock and cook until the sauce is reduced nearly by half or thickened and richly flavored, about 4 minutes.
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27
Remove the pan from the heat and swirl in the remaining 3 tablespoons of butter.
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28
Season with the chives, salt, and pepper.
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Spoon the sauce over the chicken and serve, passing the mushrooms and potatoes on the side.