Gather all the ingredients. Wash the vegetables and weigh them. My vegetables weigh 573 g. Use salt equivalent to 2% of vegetables’ total weight, which is 11 g.
Cut eggplants in half lengthwise and slice diagonally.
Soak the eggplants in water to prevent from changing color.
Cut the ends of cucumbers and cut again in half lengthwise.
Combine all the vegetables in a freezer bag and sprinkle the salt.
Mix all together and knead the vegatables. Press the vegetables with 2 x weight of vegetables (roughly 1 kg). Leave at room temperature for half day (I recommend just 1 hour - See my blog post for the reason).
Drain the vegetables into the strainer. Squeeze the liquid out from the vegetables and transfer back to the bag.
Mix and knead the vegetables.
Remove the air out of the bag and press with heavy object. Keep in the refrigerator for 2-3 days and you can start eating it. Transfer to an airtight container or mason jar and consume in 2 weeks.
Use Red Purple Shiso Leaves instead of Green Shiso Leaves: Prepare 30 red purple shiso leaves and salt (2% of shiso weight). Divide the salt into 3 portions. Combine the shiso and 1/3 of salt and knead well. Squeeze water out and continue 2 more times. Then add 2 Tbsp mirin and 2 Tbsp rice vinegar. Then transfer that to a bowl with tightly-squeezed vegetables.
Recipe is from this Japanese website.