1Put olive oil in the freezer for at least 30 minutes to make it very cold.
2Place a small saucepan over low heat and whisk together balsamic vinegar and agar-agar. Bring to a boil and bubble for 2-3 minutes while whisking constantly.
3Turn off the heat and let the mixture cool down for about 10 minutes.
4Transfer the liquid to a squeeze bottle, pipette, or dropper and drip the mixture slowly into the ice-cold olive oil.
5Strain the pearls out of the oil and store them in a jar in the refrigerator.