Mix all ingredients in a large bowl except the avocado. Season with lime juice and salt. Taste and adjust if necessary.Add the diced avocado and mix carefully.
Serve immediately.
Video
Notes
This pineapple salsa is best when eaten on the same day.
Use serrano peppers if you want a spicier salsa.
For a milder salsa, remove the seeds and veins from the chiles.