Peel green plantains
Cut plantains into 1-inch thick slices
Heat oil in a skillet over medium heat
Fry plantain slices until lightly golden
Remove and drain briefly
Flatten each slice with a tostonera or the bottom of a cup
Return flattened plantains to the hot oil
Fry again until crisp and golden
Remove and drain on paper towels
Sprinkle with salt
Serve immediately