Grilled Chicken with Grilled Tomatillo Salsa

pound(s) uncooked boneless skinless chicken breast

ground cumin

kosher salt divided

extra virgin olive oil divided

pound(s) tomatillo papery husks removed, rinsed, cored, roughly chopped

small jalapeño pepper(s) stemmed, seeded, roughly chopped

small uncooked onion(s) yellow variety, thinly sliced

clove(s), medium garlic clove(s) thinly sliced

cup(s) cilantro leaves (plus a few extra for serving)

cup(s) fresh lime juice