Super easy to make, you just need patience. SO delicious 
Arm yourself with a pyrex bowl sitting on a saucepan of water (not touching the water) and a whisk.
Squeeze a lemon and put some salt and pepper into the juice.
Chop 200g of butter into equal sized bits, ice-cube sized is good.
Whisk 3 egg yolks with 2 tablespoons of cold water then put them in the pyrex bowl. Heat and whisk until it starts looking mousse-y then add the butter a cube at a time, whisking. Once you have added all the butter whisk in the lemon juice.
Now stuff face with delicious hollandaise 
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