Heat a griddle or heavy based non stick frying pan. In a small dish that can take the steak snugly later combine the extra virgin olive oil, chilli flakes, dried oregano, salt and red wine vinegar.
Oil the steak lightly and put it on the hot griddle. Cook for 2 minutes on each side( for rare) then remove it to the dish of marinade . Sit for 2 minutes on each side in the marinade .
Remove the steak to a board ready for slicing. Arrange the cherry tomatoes, cut side down in the marinade dish. Cut the steak into thin slices on the diagonal and arrange on two dinner plates.
Turn the tomatoes around in the marinade then pour everything over the steak. Add a few sprigs of oregano and serve immediately.