You are here: Home » Recipes » Stuffed Tenderloin Stuffed Tenderloin Kitchen Tested Yield 18 to 20 servings Make this incredible meat ahead and refrigerate until ready to cook for an outstanding meal. PrintEmail Ingredients 1 (5- to 6-pound) beef tenderloin1 onion, chopped1 tablespoon minced garlic1 (10-ounce) bag fresh spinach, rinsed, stemmed and chopped1/3 cup seasoned bread crumbs1/3 cup grated Parmesan cheese Salt and pepper to taste Garlic powder to taste1/4 cup Worcestershire sauce1 beef bouillon cube1 1/2 cups water Instructions Preheat oven to 450F. Trim any excess fat from meat. Make a lengthwise cut along the center or the tenderloin, but not all the way through (about 1/3 way down), set aside. In a skillet coated with nonstick cooking spray, suate the onion and garlic until tender, about 5 minutes. Add the spinach and cook just until the spinach is wilted, stirring constantly, about 1 minute. Remove from the heat and stir in the bread crumbs and cheese. Season to taste. Spread the spinach mixture in the slit of the meat. Squeeze loosely together. Cover the top of the stuffing on the tenderloin loosely with foil. Place cut side up in a roasting pan. Season the meat with salt, pepper and garlic powder. Pour the Worcestershire sauce over. Cook for 40 to 45 minutes for medium rare or to desired doneness. In a microwave dish heat together the bouillon cube, water, and any drippings from the meat and 2 minutes. Slice the tenderloin and pour the sauce over.