I've got some of that too, and yes I used to call it sedum but recently learned that it's hylotelephium. Everything says it's edible, so I tried a leaf recently, but didn't find it pleasant. That was a mature leaf in midsummer though. Maybe the early spring leaves are tasty, I don't know. It's extremely easy to grow and to propagate. Mine started from a broken bit of a houseplant that I threw on top of the mulch in my greenhouse. The greenhouse goes a little below freezing for nights all winter but this thing just hunkers under the mulch and then bursts forth in spring. I agree the flowers aren't interesting.
Works at a residential alternative high school in the Himalayas SECMOL.org . "Back home" is Cape Cod, E Coast USA.
The leaves are edible, though you may not like it enough to make a meal of it. It is an *excellent* late-summer/fall nectar source for bees, butterflies, and other insects, though, which is why I plant it willy-nilly around our property. Easy to propagate!
Location: The dry side of Spokane, USDA zone 6ish, 2300' elevation.