Preheat the oven to 400°F. Line a 8x8 baking dish with parchment paper so that it overhangs on two sides by an inch or two.

Add the flax and water to a small bowl, whisk to combine and let sit to thicken for 5 minutes.

Mash two bananas in a bowl. Add the milk, applesauce and vanilla, whisk to combine.

Add the oats, baking powder, cinnamon, and salt to a large bowl, whisk to combine. Add the flax mixture and mashed banana mixture and use a spatula to combine all of the ingredients, fold in the chopped strawberries until evenly dispersed. Transfer to the prepared baking dish.

Top with sliced strawberries and banana.

Bake for 25 minutes until the edges have started to brown and the top has appeared to set.

Let cool for 10 minutes before cutting into 9 squares.