To make mayonnaise in a food processor

1. Add egg, mustard, lemon juice, and salt to a food processor. Process until smooth. 
2. With the motor still running, add the avocado oil in a slow and steady stream. Keep the motor running until the mayonnaise is thick and emulsified, but don’t over process or it can get too thick.
3. Taste and stir in more salt if desired.
4. Store in a sealed container in the refrigerator for 1-2 weeks.

to make mayonnaise using an immersion blender

1. In a large measuring cup or very tall jar add egg, mustard, lemon juice, and salt, and avocado oil – in that order.
2. Starting with the immersion blender at the bottom of the jar, blend until mayonnaise starts to form.
3. Slowly lift the immersion blender and continue to blend until thick and emulsified. 
4. Taste and stir in more salt if desired before storing in the refrigerator.