Preheat oven to 350°F and prepare an 8 inch x8 inch baking pan by lining it with a sheet of aluminum foil, leaving a few inches of overhang on the sides to allow for easy removal. Grease the foil with cooking spray or oil and set aside.

In a large mixing bowl, combine oats, flax, cinnamon, and salt. Add mashed bananas, honey, and vanilla, mixing until fully combined. Fold in dates.

Pour mixture into prepared baking pan. Using a greased spatula or your hands, spread the mixture evenly in the pan, pressing down firmly.

Bake for 20-25 minutes, until top sets and edges begin to turn golden brown.

Remove from oven and let cool in pan for 10 minutes before cutting into bars with a sharp knife.