Toast whole cumin and peppercorns over medium heat until fragrant, 1-2 min. Coursely grind
Toss sliced meat with toasted spices, ground cumin, salt, MSG, and chilis
Heat oil in wok over high heat until smoking. Add lamb mixture and stir fry until meat browns lightly
Add garlic, scallions, soy source, wine. Stir fry until liquid has evaporated
Remove from heat, toss in scallions, cilantro