Description
A show‑stopping holiday or special occasion main course: beef tenderloin butterflied, filled with a savory spinach‑mushroom‑Parmesan mix, rolled, roasted, and served with a rich pan sauce.
Ingredients
- 8 Tbsp salted butter (1 stick), softened
- 8 oz cremini mushrooms, chopped
- 2 garlic cloves, finely chopped
- 1 shallot, chopped
- ¼ tsp crushed red pepper flakes
- 2½ tsp kosher salt, divided
- 1½ tsp black pepper, divided
- 5 oz baby spinach, coarsely chopped
- ½ tsp lemon zest + 2 tsp lemon juice
- ¼ cup seasoned breadcrumbs
- ¼ cup grated Parmesan (≈1 oz)
- 2 tsp fresh rosemary, finely chopped
- 1 (4–5 lb) center‑cut beef tenderloin
- 2 cups beef broth
- 1 cup dry red wine (e.g. Pinot Noir)
- 1 shallot, chopped (for sauce)
- 4 Tbsp cold butter, cubed (for sauce)
Instructions
- Preheat oven to 425 °F. Position roasting rack in pan.
- Remove tenderloin from fridge 30 mins ahead.
- Sauté mushrooms, garlic, shallot, red pepper flakes, 1 tsp salt, and ½ tsp pepper in 2 Tbsp butter until golden (5–7 mins). Add spinach to wilt (1–2 mins). Stir in lemon zest & juice. Cool 10 mins, then fold in breadcrumbs and Parmesan.
- Mix rosemary into remaining 6 Tbsp butter.
- Trim tenderloin; butterfly lengthwise (¾″ base), open like a book. Pat dry, season both sides with remaining salt.
- Spread filling leaving 1″ border, roll tightly, and tie with kitchen twine every ~2″.
- Rub roll with rosemary butter, season with remaining pepper. Place on rack.
- Roast 45–50 mins until internal temp is 120–125 °F (rare). Use instant‑read thermometer.
- Let roast rest 10 mins under foil.
- Meanwhile, make sauce: boil broth, wine, and shallot until reduced by half (8–10 mins). Keep warm.
- Drain all but 1 Tbsp drippings from pan; sauté shallot 1 min. Whisk in reduced broth‑wine, deglaze. Reduce heat and whisk in cold butter cubes until glossy. Strain.
- Remove twine, slice into 1″ medallions, and serve topped with pan sauce.
Notes
- Use an instant‑read thermometer to ensure proper doneness (120–125 °F for rare).
- Let roast rest before slicing to lock in juices.
- Pair with mashed potatoes or roasted root vegetables to sop up pan sauce.
- Butterfly cut must stay ~¾″ thick to hold filling.