Parboil the shrimp

• Bring water to a boil in a saucepan.
• Add the shrimp and parboil briefly until just opaque.
• Drain and let cool.

Cure the shrimp in lime

• Place the shrimp in a bowl and cover with the lime juice.
• Let it cure in the refrigerator until the shrimp turn opaque and firm.

Chop the vegetables

• Dice the cucumber, tomato and red onion.
• Thinly slice the white part of the green onion.
• Finely chop the serrano pepper and cilantro.

Combine and season

• Add the vegetables, cilantro and serrano to the shrimp.
• Season with salt and hot sauce to taste.
• Toss gently to combine.

Chill and serve

• Refrigerate until cold.
• Serve with tostadas or chips.