Pea and ham soup

Ingredients

• 1 small boneless gammon, weighing approx. 750g–1kg
• 1 onion, peeled and sliced
• 1 leek, white part only, cleaned and sliced
• 1 carrot, peeled and sliced
• 900g frozen peas
• 65g unsalted butter
• 75g banana shallots, peeled and diced
• 1 clove of garlic, peeled and finely chopped
• 160g unsmoked bacon, cut into lardons
• Salt and black pepper
• Mint oil (p.265)