1) Slice manchego into thin pieces, about the same size as the ham. Cut both the serrano and manchego into desired sized pieces.
2) Alternating the serrano and manchego, arrange the slices attractively around the platter. Can be assembled up to this point a day ahead and refrigerated overnight. Bring to room temperature before serving.
Drizzle with extra-virgin olive oil and garnish with pepper, if desired. Serve family style, giving each guest a starter plate and fork.