Mix thoroughly, taste & adjust seasoning as desired.
Turn mixture into a well-chilled 4 cup ring mold. Cover w/aluminum foil & chill for at least 4 hrs or till well-set.
To Unmold: Have ready a round, well-chilled platter large enough to allow for the salad assembly as described below. Run the pointed tip of a knife around the edges of the mold to release it. Dip the mold up to the rim into a basin of hot water for just a few seconds. Place the platter upside down over the mold. Hold the platter & mold together & invert. Shake gently to release the molded avocado cream. Repeat process if needed & refrigerate immediately.
To Assemble Salad: Fill the center of the ring mold w/shrimp. Surround the outside of the ring w/salad greens & top the greens w/halved cherry tomatoes, olives, lime (or lemon) slices & any remaining shrimp.