The most WYSIWYG of teas: 2/3 fine loose leaf Indian black tea, 1/3 dried lavender flowers (eyeballing, by volume). You could blend it yourself if you wanted. This came in an upscale 90g tin but my Indian-style cardamom black tea purchased in an airtight foil block from the ethnic supermarket followed the same principle of blessed simplicity.
I sweeten this with the lavender sugar I bought from Fuchsia ( www.flowergrocery.com ). I’m a big fan of lavender, in case the bias here wasn’t apparent.