cornstarch
low-sodium vegetable broth
gochujang red pepper paste
sesame oil
sugar
reduced-sodium soy sauce
rice vinegar
(12-oz.) package fresh gnocchi
extra-virgin olive oil, divided
cloves garlic, minced
scallions, cut into 2" pieces, plus more thinly sliced for garnish
mozzarella
Sesame seeds, for garnish