Place the cornstarch and water in a saucepan over low heat. Cook, stirring constantly, until the mixture thickens and becomes smooth with no lumps. Let it cool.

Mash the garlic cloves with salt to taste, then add lemon juice.

Add the cooled cornstarch mixture, mashed garlic with lemon, and mayonnaise to a blender.

Blend while slowly adding the oil until the sauce becomes creamy.

Enjoy!