Peel and grate yamaimo
Peel the yamaimo and grate it, or puree in a food processor or blender.
Shred the cabbage
Stack the cabbage leaves, roll them together, and use a sharp knife to shred into thin strands.
Combine veggies with dry ingredients
Add the cabbage, shiitake mushrooms, and scallions to a large bowl and toss with the flour and salt until evenly coated.
Add yamaimo and benishoga
Mix in the grated yamaimo and benishoga until it forms a batter.
Heat pan and add oil
Heat a griddle or heavy-bottomed frying pan over medium heat, then add 1 tablespoon of oil and spread it around.
Form the pancake
Add half of the batter to the pan and use a spatula to form it into a round pancake about 3/4-inch thick with even thickness.
Cover and steam
Cover the okonomiyaki with a lid, turn down the heat, and let it steam for 2-3 minutes.
Flip and steam again
When partially cooked on top and golden brown on the bottom, flip it over, cover, and steam for another 2-3 minutes.
Plate and top
Plate the okonomiyaki and top with okonomiyaki sauce, vegan mayonnaise, grated dried shiitake mushroom, and aonori.
Peel and grate yamaimo
Peel the yamaimo and grate it, or puree in a food processor or blender.
Shred the cabbage
Stack the cabbage leaves, roll them together, and use a sharp knife to shred into thin strands.
Combine veggies with dry ingredients
Add the cabbage, shiitake mushrooms, and scallions to a large bowl and toss with the flour and salt until evenly coated.
Add yamaimo and benishoga
Mix in the grated yamaimo and benishoga until it forms a batter.
Heat pan and add oil
Heat a griddle or heavy-bottomed frying pan over medium heat, then add 1 tablespoon of oil and spread it around.
Form the pancake
Add half of the batter to the pan and use a spatula to form it into a round pancake about 3/4-inch thick with even thickness.
Cover and steam
Cover the okonomiyaki with a lid, turn down the heat, and let it steam for 2-3 minutes.
Flip and steam again
When partially cooked on top and golden brown on the bottom, flip it over, cover, and steam for another 2-3 minutes.
Plate and top
Plate the okonomiyaki and top with okonomiyaki sauce, vegan mayonnaise, grated dried shiitake mushroom, and aonori.