INGREDIENTS
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2/3 cup (about 2-1/2 oz.) finely grated Parmigiano-Reggiano
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1/4 cup (1-oz. jar) sesame seeds, lightly toasted
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1/4 tsp. cayenne
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1/4 tsp. chili powder
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1/4 tsp. dried thyme leaves, crumbled
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Kosher salt
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2 sheets (about 18 oz. total) frozen puff pastry, thawed
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1 egg, beaten with a few drops water and a pinch of salt