Grate 1/2 teaspoon of orange peel from the navel orange.

Remove the remaining peel and white pith from the orange and discard.

Section the orange.

Combine the orange peel, orange sections, plain low-fat yogurt, frozen blueberries, chopped apple, ice cubes, honey, and ground flaxseed in a blender.

Blend until the mixture is smooth.

Pour the smoothie into a tall glass.

Garnish with granola, if desired.