Peel the breadfruit: Start by cutting off both ends for stability. Hold it upright and use a sharp knife to peel downwards.
Slice and core: Cut the breadfruit into quarters and remove the soft center. Slice into 1-inch pieces.
Fry the breadfruit: Heat vegetable oil in a deep frying pan. Fry the slices for 2–3 minutes on each side until golden. Remove and let cool.
Smash the tostones: Use a tostonera (or tortilla press) to flatten each fried slice.
Fry again: Return the flattened tostones to the hot oil and fry for another 4–5 minutes until crispy.
Season: Sprinkle with sea salt or garlic salt and set aside on a paper towel to drain excess oil.