"Using a pastry brush, apply well-beaten egg to the perimeter of each dough circle and immediately fold 3 sides of circle together so that the cookie becomes a triangle, and pinch corners to seal. Seal completely and firmly, using beaten egg so they do not come apart in baking."
I'm worried that without the egg they wont seal well. Would egg replacer do the job? Is there something else I can use? Or will they probably be fine without the egg?