When I do the platter I make sure that the traditional elements are there - haricot vert, tomatoes, capers, olives, anchovies, hard-cooked egg, some kind of potato - and try to make them as elevated as possible, like roasting baby yukon golds, sous-vide-ing the eggs, sprinkling tomatoes with fleur de sel etc, and adding some untraditional elements like watercress, glazed carrots. Then arrange everything in clusters on the largest possible platter, and drizzle everything with a strong garlicy dijon sherry vinaigrette, and let guests build their own plates. The protein looks impressive if you grill a whole loin of tuna and slice. But you can also do a roasted or grilled side of salmon, or even grilled chicken.