optional: black olives, artichoke quarters
-Place the chopped tomatoes, chopped avocados (pits removed!) cucumber slices
and chopped cilantro into a large bowl. (Optional: add olives and artichoke quarters.)
-Drizzle with lemon juice and olive oil, and toss to coat.
-Sprinkle with onion powder, season with salt and pepper to taste. Toss once more.
-Serve immediately.