01 -
Heat olive oil in a deep pot, add ground beef, and saute over high heat until browned. Reduce heat to medium, add grated onion, carrot, bay leaves, cinnamon stick, cloves, salt, and black pepper, and stir for 5 minutes. Add wine, cook for 1 minute, then add pureed tomatoes and tomato paste. Simmer until liquid is mostly evaporated. Remove bay leaves and cinnamon stick.
02 -
Bring a large pot of salted water to a boil. Cook pasta until al dente (3 minutes less than package instructions). Rinse briefly with cold water, drain, and transfer two-thirds into a greased casserole dish. Add grated cheese and distribute evenly.
03 -
Spoon meat sauce over the pasta layer, leveling the surface. Arrange the remaining pasta over the meat sauce evenly.
04 -
In a large pot, heat olive oil and flour over medium-high heat, whisking constantly until nutty. Remove from heat and gradually whisk in milk to prevent lumps. Return to heat and cook, whisking, until thickened. Remove from heat, cool slightly, and stir in nutmeg, salt, and grated cheese. Add eggs one at a time, whisking well.
05 -
Preheat oven to 355°F (180°C). Pour béchamel sauce over the pasta, level with a spatula, and sprinkle with remaining grated cheese. Bake for 50-60 minutes until golden brown. Let rest for 30 minutes before slicing.