Start by making the gremolata and then set it aside.
Preheat the oven to 175 degrees Celsius.
Slice potatoes and place on a parchment covered baking sheet with some olive oil and sea salt. Bake in the oven for about 15-20 minutes.
Preheat an iron pan over medium/high heat with some olive oil (and butter if prefered)
Season the beef with sea salt and black pepper (don't be shy) and fry the beef slices/slice for about 1-2 minutes on each side, until golden brown.
Place the beef in a oven safe baking dish and bake until it reaches 59 (raw) 61 (medium) 65 (well done) degrees inner temperature.
At the same time as you add the beef to the oven add the red grapes and let them bakes until the beef is done.
Meanwhile slice the cheese.
When the beef is ready turn off the oven, take out the beef and let it rest for 5-10 minutes. Then slice it into thin slices.
Arrange beef, baked potatoes and grapes and sliced blue cheese on a plate and serve immediately.