Preheat oven to 350F. Line an 8-inch square baking pan with parchment paper and set aside.
In a large bowl, combine peanut butter, honey, banana, 2 tablespoons coconut oil, and vanilla until smooth. Add oats, pecans, flaxseeds, cinnamon, and salt and fold until dough is just combined.
Spread dough in an even layer in prepared pan. Bake bars at 350F 20-25 minutes until edges of bars are a light golden brown. Allow bars to cool completely on a wire cooling rack.
Place chocolate chips and remaining 1/2 tablespoon coconut oil in a microwave-safe bowl. Microwave 1 minute on high, stirring at 15-second intervals until chocolate is smooth and melted.
Drizzle chocolate over cooled bars, top with sea salt if desired, and cut into 10 even bars. Enjoy!