This recipe requires a little bit of work but it is worth it. It is somewhere between a pasta dish and soup. The orzo slurps up the salty liquor from the mussels and brings together the irony spinach and sweet shellfish. This is a bright and pretty dish that delivers on flavour as well as looks.
Alternative suggestions: to take this recipe in a different direction and have a richer version, replace the tomatoes with 100ml cream, which should be added when you combine the spinach and mussels together. In this instance, do not use the fennel seeds or chilli and replace the marjoram at the end with more parsley.