Cut stale white bread in one-third inch slices, trim off crust and cut slices in crescents or triangles, then sauté a golden brown in butter. Spread with Anchovy paste or with French mustard, then arrange flaked smoked sturgeon over canapés. Sprinkle thickly with finely chopped olives and pimentos. Garnish each with a rolled fillet of Anchovy. Dispose each canapé on a bread and butter plate covered with a paper doily and garnish with sprays of parsley.