Peel of plantain by cutting of two ends. Make a slit along one side of plantain start peeling off sideways. Slice plantain diagonally 1/2 inch thick. Pour 2 cups water in a pan add garlic salt. Soak sliced plantain in garlic water for 15 minutes or more. Pour oil in a frying pan. Drain sliced plantain and fry in medium heat until slightly tender.
Remove from frying pan. Using the skin of the plantain or a piece of paper towel etc. Smash semi-cooked plantain. Soak again in garlic water for 10 minutes. Drain and fry again in medium high heat until crispy.
NOTE: This is a continuous process as you are cooking more than one sliced green plantain.