This recipe makes two bread loaves filled with a spinach and ricotta cheese filling. Cut into slices and serve warm or pack for a picnic. You can experiment with different fillings, such as mozzarella or sun dried tomatoes.
Dissolve yeast and sugar in warm milk; add oil, salt and flour until combined. Cover the dough with a cloth and set aside for 30 minutes.
Preheat oven to 180 C / Gas 4. Lightly grease and flour a shallow baking tray.
To make the filling: mix spinach, egg white, ricotta and salt together in a bowl.
Roll out the dough on a lightly floured surface to 1cm thick; slice in half lengthways to create 2 pieces of bread dough.
Spoon filling down centre of each piece of dough, then roll up lengthways into a long roll. Place rolls on prepared baking tray and brush all over with beaten egg yolk.
Bake in preheated oven for 35 minutes, or until golden brown. Cool rolls for 5 minutes before slicing and serving hot.