To a high powered blender of food processor, add one half of one of the avocados, arugula, basil, chives, garlic, a dash of salt and black pepper to taste, mayo and Greek Yogurt. Puree until smooth, transfer to an airtight container and refrigerate until you are ready to use.
In a large bowl, combine the ground beef, egg, bread crumbs, onion powder, garlic powder, Worcestershire sauce and a dash of salt and black pepper. Mix with clean hands or a heavy wooden spoon until the ingredients just come together. Form the meat into 3 equal-sized patties and set aside.
Heat your grill or griddle pan over medium heat and spray the patties on both sides with a non-stick spray. Cook the burgers for 3-4 minutes (for medium to medium-rare) on each side or until cooked to your liking. Remove from heat and set aside to rest for a minute.
Assemble your burgers, by spreading a layer of the green goddess sauce on the toasted bread. Layer remaining sliced avocado, lettuce, micro greens, cucumbers and mozzarella on top of each burger patty.
Serve immediately and enjoy!