One of the Mediterranean diet's greatest strengths is that it's not super restrictive. While some diets call for sticking to a list of food that's depressingly short, the Mediterranean diet is more of a ~lifestyle~ that emphasizes nutritious, whole foods without completely forbidding anything. If you're unfamiliar with the diet, though, that freedom makes grocery shopping pretty open-ended, which could be overwhelming when you're staring at the produce in the grocery store.
Mediterranean Diet Shopping List
Meat/Fish
Grains
Legumes/Nuts
Fruits
Vegetables
Eggs/Dairy
Condiments/Herbs