3 beef tenderloin rich mushroom Recipes

beef tenderloin (have butcher clean tenderloin), kosher salt & freshly ground black pepper, extra virgin olive oil, store-bought puff pastry , defrosted (17.5 oz.), butter, melted, chopped fresh rosemary, coarse sea salt, fresh spinach, garlic clove, butter, ground nutmeg, assorted wild mushrooms, quartered, thyme, leaves, butter, flour, red wine, demi-glace (store-bought or homemade ) or 2 cups rich veal stock (store-bought or homemade), parchment paper

whole beef tenderloin, trimmed, olive oil, ground black pepper, vegetable oil, all-purpose flour, beef broth, dry white wine or 1/2 cup water, white mushrooms, cleaned and sliced thin, chopped fresh rosemary or 1 tsp dried rosemary leaves, crumbled, salt, ground black pepper, fresh rosemary (to garnish ) (optional)