In a large blender combine the flour, semolina, sugar, baking powder, instant yeast, salt and milk. It should have the consistency of very runny pancakes.
Cover with a towel, and let the mixture sit in a warm place for 30 minutes. Blend the mixture again and let it rest for 10 more minutes.
Meanwhile, make the simple syrup. Combine sugar and water in a small saucepan over medium-high heat. Bring to a boil, then lower heat to medium and cook, stirring occasionally, until the sugar has dissolved, about 1-2 minutes.
Stir in the orange blossom water and lemon juice. Pour syrup into a heat proof container and allow to cool.
When the batter is done resting, heat a non-stick pan on medium heat, then pour 2 tablespoons of the batter onto the pan and you’ll notice the appearance of bubbles.
Cook until the bubbles dry out and the bottoms become golden, about 2 minutes. Do not flip. (If no bubbles are appearing, add more water or milk since your batter is probably too thick.) Set aside in a warm place covered so they remain moist.
Preheat the oven to 400°F and line a baking sheet with parchment paper. In a small bowl, combine the ricotta, mozzarella cheese and 2 tablespoons of the prepared simple syrup. Place a heaping tablespoon of the filling into each pancake and pinch the sides together.
Place the closed atayef on a baking sheet lined with parchment paper, spray with cooking spray and bake for 40 minutes, flipping halfway through.
Serve immediately, drizzled with simple syrup, if desired.
Notes
Storage: Place in an airtight container in the refrigerator for up to four days.