Preheat the oven to 220°c/425°f. Line a 9x13 inch baking sheet.
Add the almond milk, apple sauce, coconut oil, apple cider vinegar and vanilla extract and to a bowl. Mix well and place to one side.
In a large mixing bowl, combine the spelt flour, almond flour, baking powder and soda, and salt. Stir until they are well combined.
Squeeze the excess water from the grated apple and discard it, then stir the apple through the wet mixture. Slowly add the wet mixture to the dry mixture, whisking gently as you go. Whisk until just combined, being careful not to over-mix.
Pour the mixture into the lined baking sheet, and smooth it down into an even layer. Top with slices of apple and flaked almonds.
Bake in the oven for 15-20 minutes, until golden and cooked through. Leave to stand for 5-10 minutes for best results, then slice into squares to serve.