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1
Preheat a slow cooker to Low.
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2
Place a large saute pan over medium-high heat.
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3
Lightly coat the bottom of the pan with olive oil.
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4
Cook the mushrooms until they are browned and very fragrant, about 5 minutes.
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5
Reserve the mushrooms in a covered container.
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6
Turn off the heat under the saute pan.
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7
Pat the chicken pieces dry with paper towels.
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8
Lightly season the chicken with salt and pepper.
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9
Mix together the flour and porcini dust.
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10
Dredge the chicken pieces in the flour mixture.
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11
Return the saute pan to medium heat and add more oil if necessary.
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12
Brown the chicken pieces, in batches, on both sides, about 7 minutes per side.
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13
Transfer each batch of chicken to the insert.
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14
When all of the chicken has been browned, drain off all but 2 tablespoons of the fat.
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15
Cook the onion, shallots, carrots, and celery in the saute pan, in batches, until the vegetables are lightly colored, about 5 minutes per batch.
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16
Season each batch with salt and pepper.
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17
Add the garlic to the last batch and cook for 3 minutes more until the garlic is very fragrant and has softened slightly.
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18
Transfer each batch of vegetables to the insert.
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19
Increase the heat under the saute pan to medium-high and add the wine.
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20
Scrape up any browned bits with a wooden spoon.
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21
Transfer the wine to the insert.
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22
Add the tomato paste, stock, and bouquet garni to the insert.
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23
Stir to combine.
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24
Cover and cook on Low for 8 hours, until the chicken is very tender.
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25
Gently remove the chicken pieces to a serving platter and set aside to keep warm, tented with foil.
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26
Pour the braising liquid through a fine-mesh strainer into a large saucepan.
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27
Press on the vegetables to get all of the liquid, then discard the vegetables.
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28
Skim off and discard the fat.
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29
Bring the liquid to a boil, then simmer until about 2 cups remain.
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30
Add the pearl onions and mushrooms to the sauce to warm them.
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31
Spoon the sauce over the chicken and serve with your choice of accompaniment.