In a large bowl, combine the eggs, milk, and flour. Whisk until smooth. You want the batter have a pourable consistency, almost like thick cream. So feel free to add more milk if too thick, or more flour, if too runny.
Place a non-stick frying pan/skillet on medium heat and add a teaspoon of salted butter. Circle the butter around the pan to cover the base, then scoop a ladle of the batter into the centre of the pan and gently swirl it around to even out the pancake. Fry for 2-3 minutes until golden and patchy, then flip and fry on the other side for another minute until golden and patchy. Set aside on a plate and repeat for all 6 pancakes.
Next up, make the ricotta spinach filling by combining the chopped wilted spinach, ricotta, dried oregano, minced garlic, grated mozzarella, zest of a lemon, salt, and pepper in a bowl. Mix until well combined. Taste and season accordingly.
Place a cooked pancake down on a clean surface or chopping board and add ⅙ of the ricotta filling into one quarter of crespelle. Fold the pancake in half, then in half again, forming a quarter-fold or handkerchief-style fold. Repeat for the other 5 crepes.
Get yourself a medium-sized baking tray or oven-dish and overlay the crespelle into the dish like a fan. Top with blobs of butter and grated parmesan. Place under the grill for 5-10 minutes until the cheese and butter have melted and the pancakes are golden.
Top the crespelle with fresh dill and parsley.
In a small bowl, combine the harissa paste, lemon juice, and melted butter. Stir and season accordingly.
Serve up the ricotta and spinach crespelle onto plates, and drizzle with the harissa lemon butter. Enjoy warm!