For the pizza buns, roll out the puff pastry, spread with ketchup. Place the ham on top, sprinkle with a small part of the cheese and the corn and seasoning.
Roll the dough tightly from the short side and press the ends well. Using a large knife, cut thin (about 8 mm) slices from the roll.
Place these on a baking tray lined with baking paper and sprinkle with the remaining cheese. Bake at 200 °C for about 15-20 minutes until the cheese has melted and the snails are golden brown.