Mound filling in Centre of dough, ensuring to scoop up many of the sugar and cornstarch in bowl, and unfold out, leaving a 2" border all around edges. Fold dough up and more than filling, overlapping a little. Brush dough with egg and sprinkle dough and filling generously with http://andersonlifol.articlesblogger.com/24734599/rhubarb-recipes-for-dummies