Grocery Staples That Make It Easy br to Stick to a Mediterranean Diet.br The Mediterranean Diet is repeatedly br hailed as one of the healthiest diets.br But it can be confusing trying br to figure out what foods to buy.br According to experts, keeping these essentials in your kitchen can help you to stay on track.br Greek Yogurt.br Flax and Chia Seeds.br Oats.br Nut Butter.br Plant-Based Protein , (such as chickpeas, hummus and pre-cooked lentils).br Grains , (such as couscous, pre-cooked quinoa br and whole-grain breadswraps).br Frozen and Canned Fish.