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Great! I am excited for you. Think of adding even a tsp to anything that you may want to firm-up a little bit.

Do they have much of a flavour, or can they be used for both savoury and sweet without affecting the overall taste too much???

They have a slight "nutty" flavour. Good for both sweet and savoury.
Mixed with water, they are often used as an egg-replacement in recipes.

I see, that sounds cool. I will buy them as soon as I can, and then hopefully you'll see featured in some of my recipes in due course!!!