The first step for this dressing is to find a small jar or container.
Firstly, take your 3 tablespoons of olive oil and pour into jar.
Now get your 40mLs of vinegar and add to jar
Next grab a medium sized piece of garlic and cut it finely. (You don't want huge chunks of garlic floating around in your salad.) Add to jar
Add your mayonnaise and sugar
Now and salt and pepper. Place lid on very TIGHTLY and shake well. (I've had plenty of experiences when the lid hasn't been on properly!)
Ta da!! Your French dressing is now complete! Enjoy!