You’re going to have to try the momos or dumplings at the various street vendors in McLeod Ganj & Dharamshala.
There are plenty. And for the picky vegetarian ones, I was able to locate a couple that served only vegetarian momos.
I tried one by the Bhagsu Nag temple / waterfall area. And another by the Club Mahindra resort in Dharamshala.
And they both were good. The one by the Bhagsu Nag area had a very tasty, freshly prepared and chunky chutney. Most others seemed to have what looked like ready ones.