Ingredients

• To 'cook' the shellfish
• 1 pound shrimp, scallop or firm white fish chopped into 1/2" pieces (you can do a combo of shellfish, but I wouldn't mix shellfish with fish)
  
• 1 cup lime juice + zest from the limes
  

• For the sauce
• ¹/₂ cup ketchup
  
• 1-4 tablespoons hot sauce (something vinegary, not tabasco style)
  
• 2 tablespoons olive oil
  
• ¹/₃ cup cilantro, finely chopped
  
• ¹/₂ cup onion, finely diced
  
• ¹/₂ cup cucumber, finely diced
  
• ¹/₂ cup jicama, finely diced
  
• 2-3 tablespoons lime juice
  
• salt
  
• 1 avocado, diced
  
• a couple of sprigs of green onion for garnish
  
• big bowl of corn tortilla chips