In a large mixing bowl, combine all the dry ingredients: flour, salt, instant yeast, cinnamon, and nutmeg. Mix well.
Place the pitted dates in a blender with water. Blend until smooth and creamy to create a date paste.
Add the date paste, oil, and lemon zest to the dry ingredients.
Using a stand mixer with the K-attachment (or hook attachment), mix the ingredients on low speed (speed 1-2) for about 5 minutes until well combined, continue kneading using the dough hook attachment for another 5 minutes until the dough is smooth and elastic.
Add the raisins and mix until evenly distributed throughout the dough.
Transfer the dough to a large greased bowl, cover with plastic wrap, and let it rise in a warm place for 2-3 hours, or until it increases in size.
Once risen, turn the dough out onto a lightly floured work surface and shape it into a long log. Cut into 12 equal parts.
Form each piece into a smooth ball and arrange on a lined or greased baking tray, leaving about ½ inch between each bun to allow for rising.
Cover loosely with cling film and let rise for another hour, or until the buns have puffed up and are touching each other.
Set the oven temperature to 200°C (390°F).
In a small bowl, make the flour paste for the crosses by mixing flour with enough water to form a thick paste. Transfer to a piping bag.
Pipe a white cross on top of each bun.
Bake for 18-20 minutes until the buns are golden brown.
While still warm, brush glaze over the tops of the buns. Prepare the glaze by adding a little water to the date syrup to make it runnier.