>>21646600i will drink strange teas with you
dunno about oat milk my stomach is also sensitive to stuff like nuts
it's probably like genmaicha, I haven't had that. Japan calls roasted barley tea mugicha and Korea calls it boricha. Apparently it's a very popular cold drink for the summer in Korea but I like it hot too.
I got this one dunno if they ship to the UK or France wherever you are
https://yunomi.life/products/kanazawa-daichi-organic-roasted-barley-tea-10g-x-40-satchets 