Allioli

Aioli, allioli, or aïoli is a cold sauce consisting of an emulsion of garlic and olive oil; it is found in the cuisines of the northwest Mediterranean. The names mean "garlic and oil" in Catalan and Provençal. It is found in the cuisines of the Mediterranean coasts of Spain (Catalonia, the Valencian Community, the Balearic Islands, Murcia, and eastern Andalusia) and France (Provence, Languedoc, Roussilon). Some versions of the sauce are closer to a garlic mayonnaise, incorporating egg yolks and lemon juice, whereas other versions lack egg yolk and contain more garlic. The latter gives the sauce a pastier texture, making it more laborious to produce as the emulsion is harder to stabilise. There are many variations, such as adding lemon juice or other seasonings. In France, it may include mustard.

Source: Wikipedia