01 - Place eggs in a saucepan and cover with cold water by 1 inch. Bring to a rolling boil over high heat, then immediately reduce to medium-low and simmer for 9-10 minutes. Drain and transfer to an ice bath for 5 minutes. Peel once cooled and chop into 1/2-inch pieces.
02 - In a large mixing bowl, add chopped eggs, diced avocado, halved cherry tomatoes, diced red onion, cucumber, sliced Kalamata olives, and chopped parsley. Toss gently to distribute ingredients evenly.
03 - In a small bowl, vigorously whisk together extra virgin olive oil, fresh lemon juice, Dijon mustard, minced garlic, dried oregano, salt, and black pepper until emulsified and slightly thickened.
04 - Pour the Mediterranean dressing over the egg and vegetable mixture. Using a large spoon or salad servers, gently fold the ingredients together, taking care to maintain the avocado's chunky texture. Taste and adjust salt or pepper as needed.
05 - Serve immediately on a bed of mixed greens, in lettuce cups, or between slices of toasted sourdough. Alternatively, refrigerate for up to 2 hours before serving; do not store longer as the avocado will oxidize.