Heat the oil on medium heat. Two Separate skillets.
While the oil is heating up, peel the plantains.
Cut green plantains into about 1 inch circles.
Cut yellow plantains in thinner diagonal slices.
Fry green plantain for about one minute each side and set aside.At the same time, fry yellow plantain until each side is nice and golden. Set aside until serving.
Take the green plantain circles and flatten them. (You can smash them with the bottom of a plate, pan or cup)
Put the flattened plantains back in the oil and fry for another 2 to 3 minutes until nice and crunchy.