How can I reuse my curdled mayonnaise?

A common cookery question answered

If the mayonnaise seems to be about to curdle, add a little salt or a drop of vinegar. To rescue a curdled mayonnaise, try one of the following remedies:

Put 1 teaspoon of mustard in a large bowl and beat in the curdled mixture a little at a time.

Put a drop of vinegar in a clean bowl and beat in the curdled mixture a little at a time.

Put ΒΌ teaspoon of cold water in a clean bowl. Add the curdled mayonnaise a little at a time, stirring constantly.

Put an egg yolk in a clean bowl, beat well and beat in the curdled mixture.