This is one way I boost my fiber intake.
When I eat a banana for a snack I take 1 tablespoons of ground flax and put it in a small saucer or ramekin. As I eat my banana I dip the in in the ground flax.
The flax has 2 grams fiber per tablespoons.
The banana (2.4 to 2.8g) for a small to medium banana.