Begin by placing the egg yolks in a mixing bowl.
Add the Dijon mustard and a pinch of salt to the bowl.
Whisk until fully combined.
Slowly add the sunflower oil to the mixture.
Pour it in a thin stream while continuously whisking.
This helps achieve the creamy texture you desire in mayonnaise.
Once the mixture starts to thicken, add the white wine vinegar.
Continue whisking, this gives the mayonnaise a touch of tanginess.
If you prefer a bit more zing, stir in the lemon juice.
Whisk until totally incorporated without any lumps.
Adjust the seasoning by adding salt and pepper to taste.
Whisk again to ensure everything is well mixed.
Serve instantly or store it for later.