This rainy-day Korean snack is a favourite dinner of ours – we call it ‘humpty pigeon’, after my husband mis-read the meals blackboard. Healthy comfort food, it’s an omelette pancake based on spring onions and seafood: ‘pa’ means spring onion, ‘jeon’ pancake, and ‘haemul’ seafood. It’s usually made with shrimp or prawns among the seafood,…