Fill the frying pan or Dutch oven with enough oil to submerge the plantain about 1 inch high
Heat oil on low-medium heat
Remove the peel of the plantain by lightly scoring the peel to make a lengthwise slit and removing the skin of the plantain
Slice plantains into 1-inch chunks width-wise
Fry plantains on each side for the first time for 2-3 minutes until they’re a very light golden brown, then place them on a paper-towel-lined plate to remove the excess oil
Increase the heat to medium heat for the second fry
Flatten the fried pieces of plantain with the tostonera or flat bottom of a bowl.
Fry the plantains once flattened for a second time in a single layer
Fry them on each side for 1-2 minutes, remove them from the oil with a slotted spoon, place them on a fresh paper towel-lined plate, and sprinkle on sea salt.
Serve immediately and enjoy!