Filling
Sauce
In a large skillet over medium-low heat, add 1 drizzle of olive oil.
Add the ground beef and stir until all the meat juices have evaporated.
Season with the salt, the garlic powder, the onion powder, the sweet paprika and stir until incorporated.
Next, add the tomato paste, the water and stir again.
In a bowl, add the pre-cooked lasagna sheets, arranging them all around the edges.
To the bottom of the bowl, add the grated mozzarella cheese and top it with half of the meat we prepared earlier.
Place some lasagna sheets over the meat and set aside.
In another bowl, add the feta cheese, parsley to taste, the egg, the grated parmesan cheese and mix until combined.
Add this filling to the bowl with the lasagna and top it with more pre-cooked lasagna sheets.
Add +100g of grated mozzarella cheese, the rest of the meat and close it by folding the lasagna sheets over the whole filling.
Take the bowl to a preheated oven at 180°C (350°F) and bake for 30 minutes.
Meanwhile, in a large skillet over medium-low heat, add the unsalted butter and stir until fully melted.
Add the wheat flour and stir until combined.
Now, gradually add the milk and keep stirring into a smooth creamy sauce.
Season with the salt and one pinch of black pepper.
Add the grated parmesan cheese and stir until combined.
Once the lasagna has baked through, finish by drizzling this white sauce we made all over it and sprinkle some oregano to taste.
Serve.