question: What is a good beer pairing for Roast beef with a herb and malt crust?
answer: A great choice for Roast beef with a herb and malt crust is Paradox Islay 2018 (Whisky Cask Aged Imperial Stout.). Here's the recipe:
  This Whisky Cask Aged Imperial Stout. features a complex malt bill including Extra Pale (6.5 kilograms), Flaked Oats (2 kilograms), and Caramalt (0.875 kilograms). The hopping schedule uses Columbus (60grams @ Start), and Columbus (20grams @ Middle) for balanced bitterness and aroma. Brew this as part of a parti gyle mash, making this beer from your first runnings. It will take a long time to run off and be prepared to add dextrose to reach your target OG.