Barretta con grano saraceno al mirtillo

blueberry fruit preparation 35% (glucose-fructose corn syrup, apple puree, blueberry puree 23%, gelling agent: pectin, acidity regulator: citric acid, natural flavors), buckwheat flour 16%, rice flour, palm oil, cane sugar, corn starch, glucose-fructose syrup from corn, egg yolk, apple fiber, raising agents: monopotassium tartrate, sodium carbonates, salt, natural flavouring, thickener: guar gum,