Sprinkle yeast and sugar into warm water and mix.
Allow to sit for 10 minutes until mixture begins to bubble.
Combine flour and salt in large bowl, make a well in the centre, pour in yeast mixture and beaten egg and gradually work in the flour to make a dough.
Turn out onto lightly floured surface and knead thoroughly until smooth and elastic - at least 5 minutes.
Use only enough flour to prevent the dough from sticking to the surface.
Place in lightly oiled bowl, turn dough to coat with oil and cover with a clean cloth.
Allow to rise for 45 minutes, or until doubled in volume.
Punch down and then use as directed in recipe. (Use rolling motion with fists to force-stretch dough to size of pizza pan)