Seaweed
A wonderful range of colours, shapes, textures and flavours

An Introduction to Seaweed

When I ask a group of guests on a seashore foraging course “who has eaten seaweed before?” it’s usually about half that put their hands up. I ask if it was crispy seaweed and for most it was. However, on most occasions, it’s not seaweed that they were actually given but deep-fried spring greens – a type of cabbage! Those that have really eaten seaweed have usually done so in either Japanese restaurants or in the Welsh dish Laverbread. Almost everyone will have however eaten seaweed regularly as extracts from it are used in a wide variety of food products. For example, it keeps ice cream smooth and creamy, is used in beers for a more stable and lasting foam and in wines to help clarify the colour. As a thickener or stabilizer, it appears in sauces, syrups, and soups, mayonnaise, salad dressings and yoghurt.

Seaweeds are most popular in East Asian cuisine (Japanese, Chinese & Korean). Nearer to home, there is a long history of using some species in Ireland and Wales. Seaweeds are rich in minerals especially iodine, proteins and vitamins. One has 10 times the calcium of cow’s milk, twice the vitamin C of oranges, and 50 times the iron of spinach!

Foraging for Seaweed

Gathering seaweed
Gathering seaweed

Seaweeds are probably the least foraged wild food group, however, there is lots of good news for the forager:

  • Of the 500 or so species in British waters about a dozen are eaten, so learning them is a lot easier than plants or fungi.
  • There is only one poisonous species, but you won’t encounter it being only found in very deep waters, like midway across The English Channel.
  • If you like East Asian cuisine, we have many of the same or equivalent species on our coast.
  • Seaweeds can be preserved for future use.
Species of edible seaweed
Some of the species of edible seaweed

The coast is perhaps the most dangerous foraging environment with more ways to come a cropper than other environments. I won’t go into detail here, but among the dangers are being cut off by the tide, hit by a landslide, slipping on rocks and getting stuck in mud. Take care!

The best time to gather seaweed is as the tide is falling and the best months are May and June. You should look in areas away from sources of pollution such as sewage outfalls and where rivers come to the coast. So your seaweed gathering has minimal impact, you should always cut it with scissors and not tear it off the rocks. Do not cut too near the holdfast (“root”), leaving a third of the length and it will happily grow back. You should generally, only gather seaweed that is still attached so it has not deteriorated. As with all types of foraging, take a little here and a little there.

At the coast, rinse it in seawater to remove any sand, shells or creatures. The easiest way is to put a handful into a bucket / large bowl of water, give it a good swirl then put into a colander to drain. If it is sandy, give it multiple washes. Once cut and washed, put it in string bags (e.g onion sacks) to let the water drain. I strongly recommend that you put each species in a separate bag so you don’t need to spend hours at home sorting them out! If you’re collecting on a warm day, use a cool box to keep the seaweed chilled until you get home. If it becomes too hot it will start to break down and get mucilaginous and slimy.

The Law

The usual law that applies to foragers, The 1968 Theft Act, covers fruit, fungi, foliage and flowers but not seaweed. You should be okay collecting it for personal use but technically you need permission from the owner of the foreshore (Council, National Trust or private landowner). Below the High Water Mark, the landowner is usually The Crown. John Wright’s Edible Seashore book includes excellent coverage of the legal aspects of seashore foraging.

Seaweed in The Kitchen

The key thing for cooking with seaweed is that you need to appropriately use each species. It’s not just a case of boiling any of them as you would a vegetable, each has its own role in the kitchen. They are more versatile than you would think, besides being used in soups, starters and main courses, they can be used in puddings, breads, cakes and drinks. On our “Seaweed and Eat It” day long foraging course, learning about their roles is our focus. There are, however, simple ways that you can easily add seaweed to your regular diet and enjoy the health and taste benefits.

Dried seaweed flakes, here Gutweed.
Dried seaweed flakes, here Gutweed.

It is easy to produce a jar of dried seaweed flakes. This is one or more of Dulse, Sea Lettuce, Laver (Nori), Bladderwrack, Gutweed and, optionally, a little Pepper Dulse. These seaweeds are washed thoroughly and then have been dried (below) and ground / flaked (below). The result is stored in a glass jar where it will keep for a long time (though once you get the flavour you will use it regularly!). You can:

  • Sprinkle on cooked vegetables, salads, eggs, noodles, pizza or pasta dishes, popcorn, soups and sauces.
  • Put in a salt shaker with sea salt and using as a condiment.
  • Add when making bread / savoury scones etc.
  • Mix into soft butter for Seaweed butter, optionally adding lemon or lime juice, chilli flakes etc. Serve on bread or with fish, vegetables, noodles or pasta. This can be frozen.
Seaweed Soda Bread
Seaweed Soda Bread

 

Seaweed Butter
Seaweed Butter

 

Savoury Scones
Savoury Scones

Drying Seaweed

Your technique will depend upon how much time you have, the size of the seaweed and the weather. Natural drying in sunlight and fresh air is the traditional approach but if it is too windy or wet you may have to rethink – garage, conservatory or greenhouse (ideally not the house – you will get complaints!). If drying flat, turn them occasionally. Whatever your approach, they want them to be totally dry but still pliable. Dried seaweed can then be stored for years in sealed plastic bags or glass jars in a cool, dry place away from direct light. Some are used dried; others are rehydrated before using.

Options:

  • Sunny windowsill
  • Cake cooling racks
  • Clothes drying rack
  • Dehydrator – 40 degrees C so the nutrients are not damaged. You can use this for drying mushrooms, fruit and veg too. C. £40
  • Mushroom trays
  • Sheets / tarpaulin
  • A very low oven (40 degrees C) overnight.
  • The washing line / a rotary drier / a sock drier
Drying Gutweed (in the green house - a bit windy for outside!
Drying Gutweed in the green house – a bit windy for outside!

Flaking Seaweed

To flake the seaweed, you may need to crisp the dried seaweed removing all moisture by either:

  • Putting on a tray or ovenproof fish in a hot oven. Check it every minute or so to see if it can be crumbled; put back if not. The time required will vary with the thickness of the seaweed and how thinly you have spread it.
  • Placing in a grill pan with a piece of greaseproof paper over the seaweed to stop burning. Put well away from the heat, turning the seaweed occasionally checking if it is crisp.

When it is crisp you can crush it, your method based on whether you want flakes or powder:

  • Pestle and mortar
  • Freezer bag / rolling pin
  • Rub between the fingers (carefully as some seaweeds may have sharp edges)
  • Food processor / Coffee (Spice) grinder (shorter time for flakes, longer for powder)

Learn More

Join us on our “Seaweed and Eat It” day long foraging course. You will find most of the edible species, understand harvesting and preserving them as well as working together to prepare, cook and eat a three-course meal with seaweed in every course. Afterwards we will email you lots of information including the recipes.

There are a good number of books on seaweed foraging and cookery with some wonderful recipes. You can browse and order some of our favourites here.

 

 

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