INGREDIENTS
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2 sheets puff pastry, defrosted overnight in the fridge (or on the counter in 40 minutes to an hour)
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1 large egg, beaten with 1 tablespoon of water
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1 cup freshly grated Parmesan cheese (original recipe called for 1/2 cup)
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1/2 cup finely grated Gruyere cheese (original recipe called for 1 cup of grated white cheddar cheese)
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2 teaspoons chopped fresh rosemary
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1 teaspoon kosher salt
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freshly ground black pepper to taste