Whisk the egg yolk with the oil

• Place the egg yolk in a bowl.
• Gently whisk the vegetable oil into the egg yolk, pouring it in a thin stream.
• Keep whisking until a mayonnaise-like consistency has formed.

Add the seasonings

• Add the Dijon mustard, salt, sugar, rice wine vinegar, fish stock, MSG and lemon juice.
• Whisk until fully combined and smooth.

Chill and serve

• Transfer the mayo to a jar and place it in the fridge.
• Enjoy once chilled.