Start by boiling a big pot of water and adding the lasagne noodles in batches. Cook them just until they are al dente, which usually takes a few minutes. Avoid overcooking them as this can lead to mushiness later.
In a bowl, mix together the ricotta, egg, half of the Parmigiano Reggiano, garlic, fresh herbs, salt, and pepper. Stir until all ingredients are creamy and well blended. Be cautious not to overmix; you want a nice texture.
Grab a baking dish and start layering. Spread a bit of the Bolognese sauce on the bottom, then a layer of noodles, followed by the ricotta mix, and a sprinkle of mozzarella. Repeat this layering until all ingredients are used, finishing with noodles topped with more sauce and cheeses. Ensure a balanced layer to avoid one section being too thick.
Pop your lasagna in the oven and let it bake until it is bubbling and the cheese has turned golden. Keep an eye on it as an overly long bake can dry it out.
After baking, let the lasagna sit for a few minutes before slicing. This allows it to firm up, making for cleaner cuts and easier serving.