Aïoli Sauce without Eggs

• 4-6 cloves garlic
• 1 boiled potato, chilled
• lemon juice
• salt and fr

Peel garlic and boiled potato. Pound garlic in a mortar until smooth; add potato and pound until it is well mixed with garlic. Add a little lemon juice, salt and freshly ground black pepper, to taste. Then, drop by drop, whisk in olive oil as you would for a mayonnaise, until aïoli is thick and smooth. Correct seasoning and serve.