Pour the olive oil into a glass and place it in the freezer for 30 minutes.

When the oil has around 5 minutes left, add the soy sauce and agar agar to a small pan, give it a whisk and bring to a boil, then reduce the heat and simmer for 1 minute, whisking regularly. Turn off the heat.

Remove the glass of oil from the freezer. Fill a pipette with the soy sauce mixture and add droplets of it to the cold oil. The pearls will form immediately as they sink to the bottom of the jar. If you don’t have a pipette, you can use a fork instead. Once you’ve used all of the soy sauce, strain the pearls into a fine sieve. The oil can be re-used, so pour it back into the bottle or keep separately.

Rinse the pearls under running water and use straightway.