Place a cast iron skillet in the oven and preheat the oven to 450 degrees.

In a blender, combine the eggs, milk, vanilla, almond flour, starch, and salt and blend until fully combined. Let sit a few minutes.

Carefully remove the pan from the oven and add the butter, swirling the pan to coat with the butter. Pour in the batter, scatter the peach slices and blueberries on top and return the pan to the oven. Cook for 15 – 20 minutes or until puffed and golden. Lower the oven temperature to 300 degrees and cook for another 5 minutes.

Serve immediately with maple syrup.