Method
1. In a clean large mixing bowl mix together quick-rise yeast, sourdough starter, water, brown sugar, vegetable oil, egg and salt
2. Mix the flour into the bowl until all the liquid is absorbed
3. Pull the dough together with a dough scrape or spatula and form into a ball
4. Place the dough onto a floured surface, knead vigorously until elastic - approx 10 min
5. Let rise slowly until doubled and continue - approx 8 hr
6. Grease cookie sheet with butter
7. Divide into equal 6, 7, or 8 equal size balls depending on the size you want
8. Place them on the greased cookie sheet and cover
9. Leave and let rise - approx 30 min
10. Pre-heat oven - 205°C / 400°F
11. Brush rolls with egg yolk
12. Press the rolls down gently to flatten them a bit. With a very sharp knife cut a cross into the top of each roll
13. Pour boiling water into the pan in the oven
14. Bake rolls for 15 min