In a medium serving bowl, combine all of the ingredients. Stir to combine.
Adjust to taste, if necessary: For more zing, add about 1 teaspoon more vinegar or 1 tablespoon more lime juice. For more flavor overall, add another pinch of salt. For more spice, add more jalapeño.
For best flavor, allow the salsa to marinate for 20 minutes before serving. This salsa keeps well in the refrigerator, covered, for 3 to 4 days.