Preheat your oven to 200°F (95°C). Line a baking sheet with parchment paper.
Slice the bananas into thin, even rounds, about 1/8 inch thick.
In a small bowl, mix together the sugar, cinnamon, and salt.
Place the banana slices in a large bowl and drizzle with lemon juice, tossing gently to coat.
Sprinkle the cinnamon-sugar mixture over the banana slices, ensuring they are evenly coated.
Arrange the banana slices in a single layer on the prepared baking sheet.
Bake in the preheated oven for 2 to 3 hours, flipping the slices halfway through, until they are dry and crisp.
Remove from the oven and let cool completely before storing in an airtight container.