"The tangy, mouthwatering sauce here is inspired by agrodolce, an Italian sweet and sour sauce made by reducing vinegar, sugar, and spices...."
INGREDIENTS
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2 pork tenderloins (about 2 lb. total)
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1 tsp. freshly ground black pepper
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3 tsp. kosher salt, divided
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2 medium red onions
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1 medium head of red leaf lettuce
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1 large fennel bulb (with stems and fronds)
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3 Tbsp. cold unsalted butter
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5 Tbsp. extra-virgin olive oil, divided
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5 Tbsp. honey
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1 tsp. crushed red pepper flakes
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1 cup plus 1 Tbsp. red wine vinegar