• Fixing watery pico de gallo: Make sure to deseed the tomatoes and hold off on salting until just before serving if making ahead. If it does get watery, just drain off the excess before serving.
• Removing the raw onion taste: If you're worried about a heavy onion flavor, soak them in a bowl of ice water for 20 to 30 minutes before adding them to the other ingredients. Pat them dry before mixing.
• About the heat: Jalapeño spice comes from the seeds and white membranes, not the flesh. Remove both for mild, leave some membrane for medium, keep the seeds (or swap in a serrano) for spicy.
• Fixing bland tomatoes: If your tomatoes taste flat, add an extra pinch of salt. Cherry or grape tomatoes are often more flavorful year round but contain seeds that can't be removed.

Storage

• Refrigerator: Store in an airtight container up to 3 days. Drain excess liquid before serving leftovers.
• Make ahead: Chop ingredients up to a day in advance and store separately. Combine with lime and salt 15 minutes before serving.