Place your avocado halves on a serving platter and spoon out some of the center of each to equal the 1/2 cup mashed you need for the recipe then set them aside while you make the rest of the filling. Place your avocado halves on a serving platter and spoon out some of the center of each to equal the 1/2 cup mashed you need for the recipe then set them aside while you make the rest of the filling.