To make the dough, pour the oat milk (or filtered water) in a small pan and heat until warm (about 110°F/43°C). Remove from the heat and whisk in the dry yeast and honey until dissolved. Leave to activate for about 15 minutes, or until frothy.

Meanwhile, whisk together the sorghum flour, tapioca starch, brown rice flour, psyllium powder, and salt. Pour in the yeast mixture and olive oil. Stir to combine with a fork or spatula, incorporating the flour mixture into the liquid until it starts to form a dough. If you have a stand mixer with a dough hook, you can mix the dough for 3 minutes on a moderate speed setting until the dough is smooth. Either way, the dough will appear a bit sticky at first, but it should hold together well and have some bounce. Add a little more flour or milk if necessary.

Dust a work surface and baking sheet with a little brown rice flour. Turn out the dough onto the work surface and form into a cylindrical shape. Cut the dough into three equal pieces  and roll each piece into a ball. Place on the baking sheet, allowing a good three inches of space between each ball to allow for expansion as the dough proves. Cover the dough with a clean tea towel and leave to rest somewhere warm for about an hour.

To make the filling,  put the spinach (or nettles) into a medium pan of boiling water and cook for 2-3 minutes, then drain and immediately rinse with cold water. Using you hands, squeeze as much liquid out of the spinach as possible. Chop the leaves and stalks finely.

Shred the wild garlic leaves (or sorrel) and add to a bowl with the spinach and thinly sliced wild leeks (or spring onions). Crumble in the feta and a good squeeze of fresh lemon juice. Combine well and season to taste.

Preheat the oven to 220°C/425°F.

Dust your work surface and hands with brown rice flour. Take the balls of dough (which should have risen by now), and using a rolling pin, gently roll each piece of dough into a 30cm circle. Take the filling, and divide it between the centre of each prepared circle of dough. Take one edge of the circle and fold it into the middle. Take the next edge and fold it into the circle. Continue until you have created about six folds and it resembles a flattened purse. Flatten it a little with your palms to distribute the filling into the edges of the dough. Gently flour the top of each flatbread, turn it over, and carefully place them on a floured baking sheet. Make a little hole with the tip of a sharp knife to let the steam out as the flatbreads are cooking.

Cover the flatbreads with a clean tea towel and leave to rest again for 30 minutes to an hour.

Place the flatbreads into the oven and bake for 20 minutes. Meanwhile, melt the ghee in a small pan.

After 20 minutes, remove the flatbreads from the oven and brush with the melted ghee. Return to the oven for about 5  minutes, or until lightly golden. Sprinkle with smoked or regular sea salt.

Break open or slice the flatbreads when they are still warm, and serve with a leaf salad or alongside a spring soup or broth.