Making tostones is easy….. Slice the peeled plantains diagonally into 1" slices. Fry the slices over medium heat until they soften. Remove from oil and drain on paper towels. Using a tostonera (a press), slightly mash each piece to about half an inch in thickness. If a tostonera is not available insert the pieces between a folded piece of brown-paper sack and press down using a saucer. It is best to press all the pieces first before going on the next step. Dip each piece in warm salted water and fry again until crispy. Remove from the oil and drain on paper towels. Salt them. Tostones may be served with ketchup (kid's favorite) or with garlic sauce.