- Preheat the oven to 180°C (350°F).
- In a large bowl, mix together olive oil, balsamic vinegar, sugar, and salt.
- Add the sliced white onion to the bowl and let it marinate for at least 30 minutes.
- In a hot pan, sear the filet mignon on both sides until browned, then transfer it to the oven for 15-20 minutes.
- Remove the filet from the oven and let it rest for a few minutes before slicing it thinly.
- In the same pan used for the filet, caramelize the marinated onion on low heat for about 20 minutes, stirring occasionally.
- Serve the sliced filet with the caramelized onion and enjoy!
Per maggiori dettagli o varianti vai alla ricetta completa.