In a 12-inch cast-iron skillet, melt butter over low heat. Add brown sugar and cinnamon; cook, stirring constantly, until sugar is dissolved, 3 to 4 minutes. Increase heat to medium. Add rum; cook, stirring frequently, for 3 minutes. Stir in pecans, cane syrup, and salt; cook for 1 minute. Add bananas; cook for 2 minutes, gently turning bananas to coat. Serve immediately with ice cream.
Notes
To toast pecans, cook them in a dry skillet over medium heat, stirring frequently, until fragrant and lightly browned.
Recipe by Southern Cast Iron at https://southerncastiron.com/bananas-foster/