I know this is such a simple recipe, however I find myself looking up the ratio every time I want to make it.
The ratio is 3 to 1, 3 parts olive oil to 1 part white wine vinegar.
Here's a basic recipe that I use:
3/4 C Extra Virgin Oil
1/4 C White Wine Vinegar
1 TBS Dijon Mustard
Salt and Pepper to taste
In a 2 cup glass measuring cup, whisk Mustard and Vinegar together.
Slowly whisk in Olive Oil
Season to taste with Salt and Pepper
You can also make it in a jar and shake until all ingredients are well combined.
Peace in the Kitchen!