In a large bowl combine the cooled paste and lukewarm water. Sprinkle over the yeast and stir into the liquid. Add the sugar, yeast, both flours, salt and oil to the bowl. Stir to get a rough dough then tip out onto a work surface dusted with flour. Knead for 10 minutes, dusting with more flour as needed to stop the dough sticking (but don't go craaazy on the dusting). Return the dough to the bowl you were using, pour a little oil over the dough in the bowl and turn it to coat. Cover with a tea towel or plastic wrap and set aside somewhere warm for 1-2 hours until doubled in volume.