1. Smear apricot jam generously onto each rectangle of dough. (Sprinkle on the lemon rind now, if using.)
2. Combine the nuts with the sugar, and sprinkle on top of all 12 rectangles of dough. Roll each rectangle up as tightly as possible, in jelly roll fashion.
3. Place rolls on a cookie sheet. Make slits down the top of each roll, every 2 inches. Brush with beaten egg.
4. Bake at 350°F for 1 hour.