Lemon Basil Salad Dressing

I got this out of a Tesco's magazine. I use less oil than is suggested her - up to you. Typically a salad dressing has three parts oil to one part vinegar or citrus, but I usually invert that in order to use less oil. This is good on salad but also on steamed baby potatoes as a side. Either way I like to sprinkle with toasted sesame seeds before serving.