First put some sauce on the bottom of the dish to prevent the noodles from sticking….you can also use olive oil for this.
Layer the noodles down side by side.
Spread some ricotta/sour cream/egg mixture on the pasta.
Sprinkle Mozzarella cheese on next.
Layer some sauce on next.
Sprinkle some Parmigiana – Regiano / Pecorino cheeses (mixed well) on next.
Start over again with the next layer, starting with the lasagna noodles first.
Continue until you’ve reached the top of the baking dish,
with the last layer being the Bolognese sauce.
Bake in preheated oven at 325 degrees for about 40 minutes.
For the last 5 minutes, sprinkle a final layer of grated Parmigiano – Regiano / Pecorino cheeses on top and bake until golden.
If towards the end, you believe that the cheese may burn, cover it with aluminum foil to prevent burning.