"Rugelach can be savory- it's caprese rugelach!..."
INGREDIENTS
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1 stick room temperature butter, cut into chunks
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2 tablespoons sour cream
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2 tablespoons good quality extra virgin olive oil
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1 cup all-purpose flour, plus more for rolling dough
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1 teaspoon kosher salt
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2 tablespoons Parmesan cheese
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1 cup fresh mozzarella cheese, small diced
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3/4 cup tomatoes, small diced
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1/4 cup fresh basil, cut into chiffonade (that's thin slivers)
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1 egg