Put the spinach into a medium size saucepan, cover and cook until soft.
Using a wooden spoon, move the spinach to one side of the pan, tipping it slightly and squeezing all the water out. Discard the water.
Add the other ingredients.
Cook over a medium heat for 5 minutes until the ingredients are well combined. Leave to cool.
Preheat a baking sheet in the oven on 200℃ fan or gas mark 7.
In a bowl place the ground almonds, psyllium husk powder, baking powder and salt. Stir to combine.
Combine the cider vinegar with the boiling water.
Pour the egg whites into the dry mix.
Then pour the cider vinegar/boiling water into the bowl and whisk until the mixture thickens and starts to rise up the whisk paddles.
Using a spatula, scrape down the bowl and divide the mixture into 3 equal portions.
Cut 6 sheets of baking paper, approx. 40cm each.
On a single sheet of baking paper place one portion of 'pastry dough'.
Put a second sheet of baking paper on top and roll into a rough rectangle thinly to approx. 3mm.
With both sheets in place, put in the oven for 5 minutes.
When cooked cool on a wire rack.
Repeat the process for the other 2 portions.
To construct the parcels, carefully remove the top sheet from the 'pastry'.
Cut in half down the length. And carefully peel each half off the paper.
Don't worry if there are holes in the 'pastry'.
Divide the filling mixture into 6.
Put one filling portion at the bottom of a strip of 'pastry' and flip over a few times to form a triangle. (watch video for the technique)
Brush with olive oil and place on one of the used baking paper sheets on a baking tray.
Repeat for all 6 parcels.
Sprinkle with sesame seeds.
Cook for 25 minutes or until crisp.