Dice the mango. I like to peel the mango first, cut it into strips, and then dice it.
Slice the tomato into quarters lengthwise and then slice each quarter again. Cut out the seeds and the flesh and discard them. Slice each piece into thinner slices and dice.
Slice the jalapenos in half. Remove the seeds and the ribs. Cut into thin slices and dice.
Chop the cilantro into medium-sized pieces.
Place the chopped ingredients into a medium-sized bowl.
Add lime juice, olive oil, cilantro, and salt and pepper.
Stir, cover, and refrigerate for 1 hour.