Start by pitting the green olives if they're not already pitted. Chop the olives, fresh parsley, and red onion. Drain the can of chopped green chilis. Chop the tomatoes. Mince the garlic.
In a mixing bowl, combine the chopped green olives, parsley, red onion, drained chopped green chilis, and chopped tomatoes.
Drizzle the fresh lemon juice, vinegar, and extra virgin olive oil over the mixture. Add the minced garlic as well.
Season the salsa with a pinch of salt and pepper. Keep in mind that olives, chilis, and tomatoes can have varying levels of saltiness, so adjust the amount of salt accordingly.
Gently toss all the ingredients together until everything is well combined and coated with the lemon juice and olive oil.
Give the salsa a taste and adjust the seasoning if needed. You can add more lemon juice, olive oil, salt, or pepper to suit your preferences.
Cover the bowl with plastic wrap or a lid and let the salsa chill in the refrigerator for about 30 minutes to allow the flavors to meld together.
Once chilled, give the salsa a final mix and then serve it with your favorite dishes. It's great as a topping for tacos, grilled vegetables, pita chips, or even as a condiment for sandwiches.