In a large mixing bowl, whisk together flour, baking powder, and salt. Create a well in the center, then pour in honey and gradually add water while mixing until you form a shaggy dough. Knead the mixture for 10-12 minutes until it becomes stretchy and smooth. Add sunflower oil, knead for another minute, then cover and let the dough rest for 30 minutes at room temperature.

While the dough rests, heat olive oil in a skillet over medium heat. Sauté the finely chopped yellow onion for about 5 minutes, or until it becomes translucent. Add diced chicken thighs along with ras el hanout, turmeric, cayenne, garlic powder, and dried parsley. Cook until the chicken is fully cooked, approximately 10-12 minutes, ensuring it's juicy and flavorful. Allow the filling to cool completely.

After the dough has rested, gently deflate it and divide it into 9 equal portions. Roll each portion into a smooth ball and flatten it slightly. Cover the pieces with a cloth and let them rest again for another 30 minutes, allowing the gluten to relax for easier stretching later.

On a lightly oiled surface, take one dough piece and lightly oil your hands. Stretch the dough into a thin rectangle, aiming for about 10 inches long, making sure the edges are slightly thinner for easier folding. Repeat this process with the remaining pieces, keeping them oiled to prevent sticking.

Place a spoonful of the cooled chicken filling in the center of each stretched dough rectangle, adding a sprinkle of cheese. Fold the dough edges over to form a sealed packet. Heat oil in a skillet over medium heat and fry each filled Msmen for about 3-4 minutes on each side, or until golden brown and crispy. Adjust the heat to ensure even cooking and prevent burning.