INGREDIENTS
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1 (17-ounce) box frozen puff pastry sheets, thawed (2 unbaked sheets)
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1 (15-ounce) container ricotta cheese
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2 cups (8 ounces) grated Cheddar cheese
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1 onion, finely chopped (about 2 cups)
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2 eggs, slightly beaten
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1/2 teaspoon salt
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2 pinches cayenne pepper