In a medium sized frying pan, heat the oil for frying. (You should have about 3 to 4 inches of oil)
Then cut the plantain in an inch-thick pieces, you will know your oil is hot when putting the first piece it will begin to bubble around it, if you want to be more thorough, have a thermometer at 320 F – 325 F.
Fry the slices for about 3 to 4 minutes, until they are lightly colored and cooked. Take them out of the oil and put them over paper towels to drain al excess oil and let them cool down.
Then tostones are smashed with a tostonera, a gadget to help flattened the tostones, if you have a tortilla press that will do if no the bottom of a wine bottle will do. Individually smashed down to about half their original height.
Heat again the oil for frying and then place carefully the smashed plantain slices to the oil and cook them about 3 minutes until the edges become golden brown. Remove them from the oil, drain again on paper towels, sprinkle with salt and serve while hot with the garlic mojo.