Steak au Poivre au Roast Potatoes

Ingredients

• 2 kg maris piper potatoes
• 2 tbsp plain flour
• 75ml vegetable oil (or roasting fats)
• 2 rosemary sprigs
• 3 garlic cloves
• 280g ribeye steak (or steak of choice)
• 2 tbsp vegetable oil
• 2 tbsp black peppercorns, crushed
• 3 tbsp unsalted butter
• handful of fresh thyme
• 1 tbsp butter
• 1 large shallot, finely diced
• 2 garlic cloves, minced
• 3 fresh thyme sprigs
• 1/3 cup cognac (or brandy)
• 1 cup beef stock
• 1/3 cup double cream
• 1 tbsp green peppercorns
• salt, to taste
• 3 shallots, finely sliced
• vegetable oil, for frying
• handful of chives, finely sliced