In a blender or a food processor, puree garlic with egg. With the food processor or blender running, add the olive oil at a very slow, steady and thin stream. You should see the mixture start to emulsify. Add lemon juice to loosen mixture. Once the mixture has emulsified, add sea salt and pepper and combine for another 10 seconds. Taste for seasoning. Transfer to a bowl, cover and refrigerate.
Again, if you'd like an easier method, just add 1 clove minced garlic, 1/4 teaspoon lemon juice and some freshly ground black pepper to 2 tablespoons full fat greek yogurt.