Start by whisking together the honey, water, brown sugar, and cinnamon in a small bowl. Set it aside for later. Cut the banana into thick ¾-inch slices.
In a small skillet, melt the butter over medium to medium-high heat. Add the banana slices in a single layer, making sure not to overcrowd the pan. Let them cook undisturbed for 1 to 2 minutes on each side, just until a golden crust forms. Watch closely; if they’re browning too fast, turn the heat down a bit.
Once the bananas are golden and tender, remove the pan from the heat and pour the honey-cinnamon mixture over the top. Let everything sit for a minute so the sauce thickens slightly and coats each slice.