Tteokbokki lasagne - Good Food Middle East

Ingredients

• 350g flat Korean fish cakes
• 500g fresh or frozen flat Korean rice cakes (tteokguk tteok)
• 2 spring onions , thinly sliced
• 1 onion , finely chopped
• 5 perilla leaves , thinly sliced into strips, plus extra to serve
• 100g grated cheddar or mozzarella
• 35g butter
• 35g flour
• 500ml milk
• 2 tbsp gochujang
• 5 tbsp soy sauce
• 2 tbsp sesame oil
• 1 tbsp sugar
• 1 tbsp Korean chilli flakes (gochugaru)