INGREDIENTS
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1/2 cup plus 2 tablespoons fresh lime juice
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1 generous pound unpeeled smallish shrimp (I prefer the ones that are 41/50 count to a pound)
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1/2 medium white onion, chopped into 1/4 inch pieces
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1/3 cup chopped fresh cilantro, plus several sprigs for garnish
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1/2 cup ketchup
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1 to 2 tablespoons vinegary Mexican bottled hot sauce (such as Tamazula, Valentina or Búfalo, the latter being on the sweet side)
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About 2 tablespoons olive oil, preferably extra-virgin (optional, but recommended to smooth out sharpness)
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1 cup diced peeled cucumber or jícama (or 1/2 cup of each)
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1 small ripe avocado, peeled, pitted and cubed
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Salt
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Several lime slices for garnish
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Tostadas or tortilla chips, store-bought or homemade or saltine crackers for serving