Chilled Iceberg with Red Onion Soy

This is a spin on an American barbecue salad that I had in New York with blue cheese dressing. The whole family was fighting over the iceberg salad - something normally considered the devil’s food among us, and in the same category as baby sweetcorn and Golden Delicious apples. In its Japanification, this salad is trimmed into rectangular squares and frozen for up to two hours prior to serving - it’s not called iceberg salad for nothing!