Unroll about 10 feet of foil and shape it into a cone approximately 3.5 inches in diameter and 9.5 inches long. Fold in the narrow end to secure the shape.
Roll out the dough to a 1/4-inch thickness and cut it into even strips about two fingers wide. Starting at the narrow end of the foil cone, wrap the dough strips around the cone, overlapping each row slightly. Use egg white to seal the joints where the dough strips meet.
Leave the wide end of the cone uncovered so you can easily remove the foil later. Braid some dough strips to form a decorative edge and use the leftover dough to shape puff pastry leaves. Brush the entire dough-covered cone and the leaves with egg yolk.
Bake in the oven at 356°F until golden brown. Once baked, cool the cone on a rack and remove the foil.
Prepare the cheese by rolling soft cheese into thin slices and cutting hard cheese into bite-sized cubes.
Slice the apple into halves, then into thin wedges, and sprinkle with lemon juice to prevent browning.
Slice the plums, peaches, and figs into bite-sized pieces, and divide the grapes into small clusters.
Fill the horn with cookies and fruit, placing the apple slices inside the cornucopia. Set the horn on a serving board and arrange the salami, cheese, grapes, and puff pastry leaves around the horn. Position the remaining ingredients so they appear to spill out of the cornucopia.