Some examples include red meat once a week, extra virgin olive oil as your main source of fat, consumption of cheese etc.
The fat coming from the antioxidant rich olive oil is what makes this diet palatable, easy to follow for the rest of your life.
This is truly the secret of the Mediterranean diet; by eating a large plate of vegetables cooked in olive oil you will get 3-4 servings in one meal and feel satisfied.
Another misconception people have is that you have to make these complex Mediterranean dishes with dozens of ingredients.
The reality is that ideally you want to eat mainly fatty fish twice a week. That fish can be canned or preserved in some way.
The Mediterranean diet is NOT a diet that researchers made up, it is a naturally occurring diet.