Ceviche (marinated fish)

INGREDIENTS:

• 1 pound of fish (tilapia fillet)                               
• 1 pound of tomatoes                             
• 1 cucumber
• 2 jalapeños peppers                                           
• 10 small limes
• a little fresh cilantro (optional)                         
• salt and pepper (to taste)
• 1 onion 

PREPARATION:

  Cut up the tilapia fillet into small pieces.
  Chop the onion into small pieces.
  Cut and squeeze the limes.
  Put the fish and onion into a bowl, then pour in
  the lime juice. Add salt and pepper. 
  Marinate the fish in the lime juice for 30 minutes.
  Cut up the tomatoes, cucumber, jalapeños and   cilantro.
  Combine all vegetables in a bowl.
  Ready to eat!