Steak Diane

Ingredients

• 4 beef tenderloin medallions, pounded to 3/4-inch thickness
• kosher salt, to taste
• ground pepper, to taste
• 1 tablespoon unsalted butter
• 1/2 tablespoon extra-virgin olive oil
• 1 clove garlic, minced
• 1 small shallot, minced
• 1/4 pound button mushrooms, sliced to 1/4-inch thickness
• 1/4 cup brandy
• 1/4 cup heavy cream
• 2 teaspoons Dijon mustard
• 2 teaspoons Worcestershire sauce
• 1/4 cup veal demi-glace
• 1 teaspoon flat-leaf parsley, finely chopped
• 1 tablespoon scallions, finely chopped
• hot sauce, optional, to taste
• wilted greens, optional, for serving