INGREDIENTS
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1 tablespoon extra-virgin olive oil
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4 ounces slab bacon (or thick-cut bacon), cut into 1/4-inch pieces
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1 tablespoon white vinegar
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1 tablespoon minced shallots
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1 1/2 tablespoons Champagne vinegar, or more to taste
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1/2 tablespoon Dijon mustard
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Salt, to taste
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2 large eggs
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1/4 pound (1 small head) frisée, rinsed thoroughly and torn into bite-size pieces
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Freshly cracked black pepper