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Beef Tenderloin Fillets with Spinach Cambozola Stuffed Mushrooms and Red Wine Sauce with steak knife on plate set on wood cutting board.
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4.58 from 7 votes

Beef Tenderloin Fillets with Spinach Stuffed Portobello Mushrooms and Red Wine Sauce

Beef Tenderloin Fillets with Spinach Cambozola Stuffed Portobello Mushrooms and Red Wine Sauce is entree and side dish all in one.  You might call this dish seriously "over-the-top!"
Prep Time20 minutes
Cook Time25 minutes
Total Time45 minutes
Course: Beef
Cuisine: French
Diet: Diabetic
Servings: 2

Ingredients

Sauce

  • 1 cup dry red wine
  • 1/2 cup beef broth
  • 1 teaspoon dried tarragon
  • 4 tablespoons cold unsalted butter cut into small bits
  • Salt and freshly ground black pepper to taste

Mushrooms and Steak

  • 2 Portobello mushrooms gills scraped
  • 5 tablespoons olive oil divided
  • 1 container (5-6 ounce) baby spinach
  • 3 cloves garlic minced
  • Salt and freshly ground black pepper to taste
  • 4 ounces Cambozola cheese torn into small pieces
  • 2 (8-ounce) beef tenderloin fillets
  • 1 tablespoon unsalted butter

Instructions

Sauce

  • Combine red wine, broth and tarragon in a small saucepan. Bring to a boil, reduce heat to low and let simmer while making the steaks.
  • Whisk the butter into the red wine sauce. Season with salt and black pepper if desired. Top steaks with mushrooms or serve alongside. Serve sauce with steaks.

Mushrooms and Steak

  • Preheat oven to 375 degrees.
  • Place mushrooms on a baking sheet and brush with 2 tablespoons olive oil. Bake for 5-6 minutes or until some of the water is released. Flip them over and allow the water to drain out while doing the spinach.
  • While the mushrooms are baking, heat 2 tablespoons olive oil over medium-high heat in a heavy skillet or saute pan. Add the spinach and garlic and cook 3-4 minutes or until wilted. Prop one side of the pan up on a folded kitchen towel or several potholders and allow any excess liquid to drain off. Pour off the liquid or wipe out with a paper towel.
  • Stir in the Cambozola cheese, then divide mixture evenly in the Portobello mushrooms. Set aside.
  • Pat steaks dry and season generously with salt and black pepper.
  • Heat butter and remaining 1 tablespoon oil over medium-high heat in a heavy skillet or sauté pan until it shimmers. Add steaks and brown well, approximately 2-3 minutes per side, adjusting heat as necessary to prevent fat from smoking. Place the stuffed mushrooms in the skillet along with the meat and transfer to the oven. Cook 5-6 more minutes for rare which is approximately 120 degrees in the center. Tent with foil to keep warm.

Notes

TIPS:
  • Use a good, heavy skillet such as cast iron to sear the fillets.
  • Be careful not to turn them too soon—give them a few minutes per side.
MAKE AHEAD:
  • The sauce can be made up to 2 days ahead and refrigerated.
  • The mushrooms can be assembled 1 day ahead of time and refrigerated.

Nutrition

Serving: 1 | Calories: 1530kcal | Carbohydrates: 15g | Protein: 67g | Fat: 124g | Saturated Fat: 50g | Polyunsaturated Fat: 63g | Trans Fat: 1g | Cholesterol: 313mg | Sodium: 1311mg | Fiber: 3g | Sugar: 6g