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2 ½ cups white onion, cut into thick julienne |
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2 ½ tablespoons butter, approximately |
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1 tablespoon fresh tarragon, chopped |
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1 tablespoon Dijon mustard |
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1 tablespoon Worcestershire sauce |
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¾ - 1 cup Roquefort cheese or similar, crumbled |
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Optional: Hamburger rolls, halved horizontally |