"Caramelized Onion Feta Pastry Bites from Trader Joe’s are one of their most popular frozen appetizers (and most expensive) and they’re easy to make at home!..."
INGREDIENTS
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1/2 box Puff Pastry (I used Pepperidge Farm)
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2 yellow onions
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2 tablespoons unsalted butter
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2 tablespoons brown sugar
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1/4 teaspoon Kosher salt
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3 ounces feta cheese
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4 tablespoons unsalted butter, melted
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1/4 cup sour cream
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1 large egg