Slice the bananas into thick coins—about 1/2 inch.
In a non-stick pan over medium heat, melt the butter until it starts to foam.
Add banana slices in a single layer and cook for 1–2 minutes per side until golden brown.
Sprinkle with cinnamon, sugar (if using), and a pinch of salt. Flip once more for flavor blending.
Serve warm on toast, oatmeal, or straight off the plate with a fork.