Finely puree the garlic and salt with a hand blender or blender.
Add half of the lemon juice and mix with the garlic mixture.
While mixing, slowly add 2 tablespoons of oil one by one.
Add the rest of the oil very slowly, with pauses, and keep blending in the meantime. Add the rest of the lemon juice alternately with the oil until everything is used up. The oil now combines the lemon juice and garlic. The result is a garlic mayonnaise.