You can use the oven to recreate the twice-fried taste and texture that is unique to tostones, a versatile treat featuring crispy flattened plantain slices. Our recipe for tostones uses the traditional twice-fried method and finishes the smashed plantains with a sprinkling of salt. However, instead of frying them twice, you can roast them twice; the first roast will soften them enough that you can smash them, while the second roast will crisp them up.