Drain the chickpeas well. Place them in a colander and let excess moisture drip off completely.
200 g cooked chickpeas
Mash gently. Transfer the chickpeas to a bowl and mash with a fork or potato masher, leaving some texture for a tuna-like consistency.
Mix Seasoning A (excluding the aonori). In a small bowl, combine Seasoning A (onion koji, soy sauce koji, powdered kokuto, olive oil, and apple vinegar).
1⅔ tablespoon onion koji, 1 teaspoon apple vinegar, 1 teaspoon olive oil, 1 teaspoon soy sauce koji, ½ to 1 teaspoon powdered kokuto
Combine. Add the seasoning mixture to the mashed chickpeas and mix well.
Add aonori gradually. Sprinkle in the aonori little by little, tasting as you go, until it enhances the tuna-like flavor.
1 teaspoon aonori
Adjust the flavor. Taste and adjust sweetness, saltiness, or acidity as needed.
ground black pepper, salt
Let it rest. Transfer to a container and refrigerate for at least 30 minutes. The flavor deepens as it rests.