"When cutting the pockets for the stuffing, make them as large as possible on the inside without enlarging the 3-inch-long incision on the outside...."
INGREDIENTS
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1 (6-oz) piece provolone
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6 oz fresh shiitake mushrooms, stems discarded
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1/4 cup chopped shallot (1 large)
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1/2 teaspoon dried thyme, crumbled
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1 1/4 teaspoons salt
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1/2 teaspoon black pepper
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3 tablespoons unsalted butter
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4 chicken breast halves with skin and bones (2 1/2 to 3 lb total)