01 -
If necessary, trim the silver skin and tie the tenderloin properly with kitchen twine. Season the beef generously with 1 teaspoon of salt and 1 teaspoon pepper.
02 -
Preheat oven to 450°F (232°C).
03 -
Heat the olive oil in a large oven-safe skillet and sear the tenderloin on all sides until evenly browned.
04 -
In a small bowl combine the melted butter, balsamic vinegar, Dijon mustard, minced garlic, and thyme. Brush the glaze over the tenderloin, ensuring all sides are evenly covered.
05 -
Place the skillet into the oven and roast for about 25 minutes for medium-rare or until a meat thermometer inserted into the thickest part reads 130°F (54°C).
06 -
Meanwhile, in a small bowl mix together Greek yogurt, sour cream, lemon juice, horseradish, and salt. Chill until ready to serve.
07 -
Remove the tenderloin from the oven and transfer to a cutting board. Cover with aluminum foil and let rest for 10 minutes. Slice and serve with the yogurt sauce.