I've eaten some fresh from my yard and it has a mild taste.
"Edible and medicinal, the leaves and upper plants are cooked as pot herbs or added to salads. The plant is very nutritious, high in iron, vitamins and fiber. The whole plant is medicinal, used as an astringent, diaphoretic, diuretic, purgative, styptic and tonic. Lab tests show that Lamium purpureum seed oil possess high antioxidant activities, and might be used as a future food-additive..."
Now granted, I'm posting about purple dead nettle (Lamium purpureum), which is less pretty than these other types, but it's very useful. Pretty sure even some of the pretty lamiums are still edible / medicinal. Worth looking into if you want to grow a type!