Ashley made a mayonnaise dressing. she noticed a few hours later that the mixture separated. what could she add to prevent the mixture from separating?

The mayonnaise dressing Ashley made separated after a few hours. To fix it, she can add one teaspoon of water to the mixture and whisk it. Add another teaspoon or two if it still doesn't mix together. The water helps the oil and egg to re-emulsify, and you will end up with a thinner yet creamier mayonnaise.