Greek salad dressing is so simple! That's why I don't recommend that people buy it at the store. Making it at home is much cheaper, and also much healthier. First, you need to start with one cup of olive oil, half a cup of lemon juice, half a cup of red wine vinegar, and mix it all together. Then, add half of a cooked and chopped garlic clove and salt and pepper to taste. The recipe is really that simple. It can last a very long time and doesn't need to be refrigerated.