This easy beef steak Diane dish is a classic recipe that will take you back in time. This beefy, peppery, creamy masterpiece is a traditional steakhouse meal of the 40s, 50s, and 60s. Featuring a flavorful and buttery-tender filet mignon drizzled with an umami-packed sauce of mushrooms, shallots, half-and-half, lemon juice, Dijon-style mustard, Worcestershire sauce, and an optional splash of brandy, it’s as big on flavor as it is on nostalgia. Get the recipe.