Prepare the Bolognese sauce by heating oil in a large pot and sautéing diced onion, carrots, and celery until softened
Add minced garlic and Calabrian chili paste, cook until fragrant
Brown the ground beef and hot Italian sausage, breaking it apart as it cooks
Stir in tomato paste and dried oregano, cook for 1-2 minutes
Deglaze the pot with red wine, scraping up any browned bits
Add crushed San Marzano tomatoes, beef stock, Parmesan rind, thyme, rosemary, and bay leaf
Simmer the sauce for several hours, preferably over two days, until deeply flavored and rich
Prepare the béchamel sauce by melting butter and whisking in flour to create a roux
Gradually whisk in warmed milk, stirring constantly until thickened and smooth
Season béchamel with nutmeg, salt, and pepper, and stir in grated Parmesan if desired
Combine ricotta, Parmesan, egg, grated garlic, fresh basil, lemon zest, nutmeg, salt, and pepper in a bowl
Thin the ricotta mixture with béchamel if needed
Assemble the lasagna by layering soaked noodles, Bolognese sauce, ricotta mixture, and mozzarella
Repeat layers until all ingredients are used, ending with béchamel and mozzarella on top
Bake until golden and bubbly, then garnish with fresh basil before serving
