Learn how to make Grilled Flank Steak Pastrami! br br Learn Now how to make Grilled Flank Steak Pastrami! br br Ingredients for 4 large portions: br - 1 trimmed beef flank steak (usually 1.5 to 1.75 pounds) br - 2 tsp vegetable oil br - 1 tbsp freshly ground black pepper br - 1 tbsp ground coriander br - 1 tbsp kosher salt br - 2 tsp paprika br - 12 tsp dry mustard br br For best results, cook to a medium. I pulled at about 135 F. internal temp, which will rise to about 140 F. as it rests.