Step 1

Chop the tilapia filets into small pieces, place them into a large bowl and cover them with lime juice. The lime juice should be enough to cover the fish, but not cause them to float in a pool of juice.

Step 2

Mix the chopped tomato, red onion, cucumber and cilantro into the bowl. Add salt and pepper to taste.

Step 3

Now, it's just a waiting game! Allow the tilapia to marinate in the lime juice for at least an hour. The key is to find the right amount of time for marination as anything less would mean your tilapia is left raw, and anything more would cause your tilapia to overcook. Taste for a check of the salt and pepper amount before serving and adjust if necessary.