"A crispy crust is topped with caramelized onions and cheese...."
INGREDIENTS
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6 oz. slab bacon, cut into ¼? matchsticks
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2 medium yellow onions, thinly sliced lengthwise
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Kosher salt and freshly ground black pepper, to taste
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2-3 Tbsp of Balsamic Vinegar
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1 ½ cups flour
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1 tsp salt
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1 Tbsp Dry mustard
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1 ¼ cups milk
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3 eggs, lightly beaten
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2 Tbsp butter
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1/2 cup shredded Parmesan cheese