Heat the oven to 200C/180C fan/gas 6. Sprinkle a little of the einkorn flour over a baking sheet, then tip both flours, the bicarbonate of soda, salt and sugar into a bowl and stir to combine. Whisk the yogurt and egg together in a jug.

Make a well in the centre of the dry ingredients and pour in the wet mixture. Swiftly mix the ingredients together to create a slightly sticky dough. Form into a round, about 4-5cm thick and put in the middle of the baking sheet. Dip the handle of a wooden spoon into some flour, then lightly press into the top to create a cross. Lightly dust with a little more einkorn flour.

Bake in the oven for 40-45 mins or until slightly risen with no grey, uncooked patches in the cross. Set aside to cool, then serve with salted butter, if you like.