Combine ground pork with oregano, green onion, garlic, Worcestershire sauce, salt, and black pepper. Form into 6 equal sized patties. Preheat grill for medium-high heat. Place patties on grill and cook for 4-5 minutes per side (depending on thickness). Once an internal temperature reach between 160-165 degrees F., remove from patties from heat and place onto clean platter.
To prepare aioli, place olives into food processor. Pulse to a fine chop. Scoop chopped olives into a medium bowl. Add mayonnaise. Use 1/3 cup, for an intense olive flavor or 1/2 cup, for a creamier texture. Add olive oil, black pepper, and mix through. Cover bowl with plastic wrap and store in fridge until ready to use.
To assemble burgers, line bottom half of bun with lettuce, place burger patty with a generous dollop of aioli on top, then cover with remaining half of bun. You can also add cheese, tomatoes, and onions to this burger.