Wash the meat, dab dry, cut in half horizontally and season with salt and pepper. Heat oil in a coated pan. Fry the meat for about 2 minutes on each side until golden brown.
Meanwhile wash the rocket and dab dry. Wash, clean and thinly slice the tomatoes. Take the pan off the heat. Cut the rolls in half horizontally, spread the bottom half with salad cream. Spread rocket on top.
Cover with meat. Spread 1 teaspoon of mustard on each, add tomato slices, fold them up and serve.