Extra virgin olive oil
Put mussels in a pan with olive oil, parsley, salt; cover with a lid and cook until they open up.
In a bowl, mix breadcrumbs, minced garlic, minced parsley, EV olive oil, white wine and salt until you get a smooth mixture.
Open mussels, put them in a baking pan, add a spoon of mixture on each mussel.
Bake for 20 minutes (180°C)