01 -
Thinly slice the onions into long strips.
02 -
Heat a large skillet or pan over medium heat and add olive oil. Sauté the onions for 30–40 minutes, stirring occasionally. Allow them to caramelize slowly without burning. Optional: Add 1 teaspoon of sugar to speed up caramelization. If onions stick to the pan, add beef broth and simmer for 10 minutes. Set the caramelized onions aside.
03 -
In the same skillet, melt butter over low-medium heat. Whisk in flour and cook for 1 minute before gradually adding heavy cream. Let the sauce thicken. To fix any lumps, whisk in ice-cold water. Stir in ⅔ of the caramelized onions and season with salt, pepper, chopped parsley, and Parmesan cheese.
04 -
Bring a large pot of salted water to a boil. Cook the Cavatappi Macaroni until just shy of al dente, as it will finish cooking in the oven.
05 -
Combine the cooked pasta with the béchamel sauce in the skillet, stirring until evenly mixed.
06 -
Transfer the pasta mixture to a baking dish. Top with the remaining ⅓ of caramelized onions and the prepared breadcrumbs. Bake uncovered at 175°C (350°F) for 10–15 minutes or until the top is golden and crisp.
07 -
Serve immediately and enjoy!