Potatoes. If you don't have small ones don't worry. Boil with skin the big ones (Yukon Gold).

Yellow and green

Wash the potatoes

Put it in a pot with cold water and salt.

When it starts to boil lower the heat a little bit. Simmer is what you are aiming for.

Drain when cooked. Similar to the papas arrugadas thing. If you used the big ones just cut them in smaller pieces when they are not so hot.

Cut the beans as you wish.

All of them.. Make enough. You can always save if you have any left.

Bring water to a boil. Season with salt. Heavily!

Add the beans. Make sure the fire is always on high. Don't worry about color mixing.

After a couple of minutes taste to see if they are cooked

Taste again..

If they are cooked chill them into a bowl with ice and water

Put them over a towel to drain the excess of water

Since the water is still boiling add a tempered egg to it. (meaning a egg that has been out of the fridge for a couple of minutes)

Boil for 6 minutes.

Chill... Same as the beans.

Put the beans in the salad bowl.

Mince some shallots

Add to it

Potatoes... Crush some to release tension.

In the bowl

Parsley

Rough chop.

Garlic... The microplane (grated) technique.

Mustard

The other mustard

It will look better than this

Peel the egg. You may come across a ugly one.

Just chop it.. Add to the bowl along with some salt and mix mix the salad.

The pretty one cut in half

Place over the salad

Season with salt and pepper

Go for it.