Wood blewit, Lepista nuda, mushrooms growing underground in compost in cave in the Loire Valley, France

Historic reconstruction of mushrooms growing in former troglodyte cave at Le Saut aux Loups, in the Loire Valley, France

Wood blewit, Lepista nuda, mushrooms growing underground in compost in cave in the Loire Valley, France

Basket of shitake mushrooms in former troglodyte cave at Le Saut aux Loups, Loire Valley, France

Basket of shitake mushrooms in former troglodyte cave at Le Saut aux Loups, Loire Valley, France

Basket of Pied Blue mushrooms grown in former troglodyte cave at Le Saut aux Loups, in the Loire Valley, France

Oyster mushrooms, pleurote champignons, Pleurotus ostreatus, grow in troglodyte cave in Loire Valley, France

Champignon de Paris mushrooms, Psalliota Hortensis, growing in former troglodyte cave in the Loire Valley, France

Wood blewit, Lepista nuda, mushrooms grow in underground troglodyte cave at Le Saut Aux Loups at Montsoreau, France

Oyster mushrooms, pleurote champignons, Pleurotus ostreatus, grow in troglodyte cave in Loire Valley, France

Oyster mushrooms, pleurote champignons, Pleurotus ostreatus, grow in troglodyte cave in Loire Valley, France

Wood blewit, Lepista nuda, mushrooms grow in underground cave at Le Saut Aux Loups at Montsoreau, France

Champignon de Paris mushrooms, Psalliota Hortensis, growing in former troglodyte cave in the Loire Valley, France

Mushrooms, Champignons de Paris, grown in former troglodyte cave at Le Saut aux Loups, in the Loire Valley, France

Borlotti beans are a legume rich in calcium and potassium.