Tenderloin with Pedro Ximenez sauce (Solomillo con salsa al Pedro Ximenez)

1 beef tenderloin or pork 
1 onion 
Kosher salt and pepper 
1 tbsp of sultanas
Pedro Ximenez Sauce







Spread the tenderloin in olive oil and season. Cook lightly in a frying pan over medium heat, only until it is crispy from outside. (5 - 10 minutes) 

In the same pan (with the meat juice), cook the onion cut into wedges and cook for 2-3 minutes. 

Place the onion with the juice on a oven dish. Add the sultanas. Place the tenderloin on top. Bake for about 15 minutes at 220 º C (until cooked. The time depends on the oven)