Step 1

Place a rack in the center of your oven and heat to 350 degrees F.

Step 2

Line an 8x8-inch baking pan with parchment paper so that the paper overhangs two sides.

Step 3

In a food processor or high-powered blender, process 1 1/2 cups of oats, flax seeds, and almonds into a fine flour consistency.

Step 4

Combine the oat/almond flour mixture, remaining cup of oats, mashed banana, maple syrup, and water into a bowl. Stir together until everything is combined and crumbly.

Step 5

Press a little more than half of the oat mixture into an 8x8 inch pan lined with parchment paper, then set the rest of the crumble in the fridge for later.

Step 6

Pour blueberries into a bowl and use a fork to mash and break down the blueberries just a bit. Stir in the lemon zest and starch of your choice.

Step 7

Pour blueberries over the oat crust.

Step 8

Sprinkle the remaining crumble mixture over the top of the blueberry mixture.

Step 9

Bake for 25-30 minutes until filling is bubbly and the oatmeal crumble is slightly golden brown.

Step 10

Cool and cut into 8 bars or 16 small squares.