In a large nonreactive container, dissolve the salt in the water. Add the base puree to the brine and mix well. Add the sliced cabbage, carrot, and daikon to the brine, cover with the reserved cabbage leaves, and weigh down with a plate. Cover the container and let stand at room temperature for 3–5 days, until the vegetables taste pleasantly sour. Store the kimchi in its brine in the refrigerator for up to several months. When serving, use a slotted spoon to remove the solids.