Cómo preparar cerveza de jengibre (!)

En un blog que me encanta he encontrado este interesantísimo artículo sobre cómo preparar tu propia cerveza de jengibre —el tan conocido ginger beer que tantas recetas piden—.
Gracias, Daniel!
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While doing some reading in a blog that I like VERY much, I found this VERY interesting article on how to make your own ginger beer —a well known ingredient that so many recipes call for and that we don't have in Spain (!)— at home.
Thanks, Daniel!