INGREDIENTS
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Chef John!
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2 1/2 to 3 pound boneless pork shoulder roast (aka pork butt)
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salt and pepper to taste
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olive oil to sear meat
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1 large shallot cut in half
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3 springs rosemary
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1 cup fresh blueberries
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2/3 cup port wine
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1/2 cup chicken broth
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2 or 3 tablespoons cold butter