1. Halve the bread and put olive oil and salt on it.

2. Then add some baby salad leafs and a sliced avocado and sprinkle with some more olive oil, S&P and a generous dash of the balsamic vinegar.

3. Fry the steak according to your liking (rare or bust) and then paste it with plenty of dijon mustard.

4. Finally slice the steak into thin strips that you put on the sandwich and top with the mustard sprouts.