Peel all garlic cloves.
Add garlic and salt to food processor. Process 1 minute until paste-like.
Add 1 tablespoon lemon juice. Process 30 seconds.
With processor running, add oil very slowly in thin steady stream.
After one third of oil is added, add 1 tablespoon ice water.
Continue adding oil slowly.
After two thirds of oil, add remaining lemon juice and another tablespoon ice water.
Continue adding remaining oil slowly.
Add final tablespoon ice water. Process until thick and fluffy.
Taste. Adjust lemon or salt. Process briefly to combine.
Transfer to airtight container. Refrigerate.