Preheat the oven to 400℉ and lightly grease a muffin pan.
In a coffee cup, mix the ground flax seeds and water. Leave to gel up.
In a small bowl, mix the flour, sugar, baking powder, cinnamon and salt.
In a large bowl, stir together the cereal, milk and apple sauce and leave for about 2 minutes until the cereal has softened. Add flax mixture and oil then beat with a hand mixer until combined.
Add the flour mixture to the wet mixture stirring just until combined. Fold in the apples or fruit of your choice.
Spoon batter into a muffin pan and bake at 400℉ for about 18 minutes or until a toothpick/knife inserted near the center comes out clean. Serve warm. Can be frozen.