Whisk the egg yolk with the mustard and vinegar and start to drizzle in the oil a tiny bit at a time whisking continuously as you do so
Once the mayonnaise has come to gether as a yellow creamy sauce you can addthe rest of the oil more quickly along with the lemon juice
Add all the other ingredients and whisk them well into the sauce
Chill in fridge for at least half an hour before serving to allow the flavours to fully develop
Video
Notes
If you are using fresh tarragon use a tablespoon of the fresh herbUse half a shallot instead of the spring onions if you preferI have measured a serving as 1 tablespoon (about 20ml)This will keep for up to a week in a lidded container in the fridge
My Top Tips*Always read the full recipe first. *Assemble all your ingredients and everything you need before you start. *For baking check the size of tins I'm using as this makes a big difference to your cakes. * I use medium sized eggs unless otherwise stated. * I use extra virgin olive oil unless otherwise stated. * I use unsalted butter unless otherwise stated. * Check out My Preserving Kit!
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