Add the baby spinach, brown onion, garlic, mozzarella, feta cheese and egg to a large mixing bowl and mix well to combine.
Cut the dough into 4 even seized pieces. Roll each one into a ball and then roll out into a large rectangle piece about 30cm x 20cm.
Add 1/4 of the spinach and cheese mixture on one half and then dab with a little water around the filling using your fingers. Fold the other half over the mixture then pinch the sides to seal. Use a fork to prick holes on top.
Brush a hot frypan with some olive oil and place the Gozleme on top. Cook on each side for 3-4 minutes until golden spots appear.
Take off, cut into 6 pieces. Drizzle with lemon and sprinkle with parsley before serving.