Crush the garlic into a fine paste. The smoother, the better the emulsion. If you like a chunkier bite, leave a tad of texture, but mostly aim for velvet.
Turn on your blender or food processor. With it running, slowly drizzle in the oil in a thin, steady stream. Don’t rush—the magic happens when the mixture can catch up with the emulsion.
When the mixture lightens and thickens, add lemon juice and salt. Pulse a few times to combine. The heady scent will tell you you’ve hit flavor nirvana.
If the sauce looks oily or splits, drizzle in a teaspoon of ice water and blend again. Repeat until it becomes glossy and fluffy like a whipped cloud.
Taste and adjust salt or lemon if needed. If you’re feeling fancy, add a pinch of baking soda to smooth any tang—go sparingly.
Transfer to a serving dish or jar. Let it rest a minute to mellow, then serve the garlic gods reign over your plate.