Luke warm milk and yeast are mixed in a small bowl. A few spoonfuls of flour are incorporated until a paste is formed. This is set aside to rise. The recipe doesn't say for how long. I just checked on it periodically. After half an hour or so, it had tripled in size. At least.
In the bowl for my stand-up mixer I added flour, salt and melted butter. Mahlab is boiled in water and then the strained liquid is added to the mixing bowl. Eggs, the yeast mixture and a few pieces of mastic that have been crushed together with a bit of sugar are added. As the dough hook worked its labor-saving magic, I added spoonfuls of flour until a good "maleable" dough came together. This is covered and allowed to rise for a couple hours.
After rising, the dough is punched down and shapes are created. I am going with simple braids. Ropes of just over a foot are formed. On a greased cookie sheet, three of these are then braided and the ends are tucked under. Cover and allow to rise in a warm place until doubled in size.
Brush with egg wash, sprinkle with sugar or sliced almonds and bake at 350° for 30 minutes, or until golden brown. When tapped on the bottom, they should sound hollow. Cool on racks.
For the record, I made a half-recipe. The full recipe makes 6 two-pound loaves. I made 2 three-pound loaves and sprinkled one with Premium Maui Gold natural cane sugar.