Cover the seeds with 4 cups of water and soak for 4-6 hours, or, preferably, overnight. Strain the seeds, rinse well under running water. Drain well and place in a blender along with the olive oil, garlic, herbs, miso, lemon juice, 1/3 cup of the nut milk.
Blend until smooth, thinning with more nut milk or water if needed. Taste and adjust with a few pinches of salt, and more lemon juice if needed.
Makes about 2 cups.