Using a one-gallon Ziploc bag. Place the yeast, sugar and warm water. Close the bag and shake, let it sit for a few minutes. Ad the Egg, salt and oil to the bag and shake again to break the egg. Add 3 cups of the flour, try to get all the air out of the bag before closing. Shake it well, roll the bag around and knead it slightly to blend in all the flour.
Let the dough rise for one hour in the bag.
Add the remaining ½ cup of flour in the bag and mix it so the dough comes away from the bag.
Divide the dough to 3 pieces, adding more flour if needed (the dough will be very soft!), roll out each piece and braid.
Place on a baking sheet and let rise another 30 minutes. Brush with egg wash and bake @ 350F for 30-40 minutes.