1/2 c. low-sodium soy sauce
3 tbsp. sesame oil, divided
1/4 c. rice vinegar
2 tbsp. sriracha
2 tbsp. honey
2 cloves garlic, minced
2 tbsp. minced fresh ginger
1/4 c. plus 2 tbsp. vegetable oil
1 lb. flank steak
8 oz. soba noodles
1 large carrot, peeled and thinly sliced
1 large cucumber, peeled, seeded, and thinly sliced
2 green onions, thinly sliced, divided
2 tbsp. sesame seeds
kosher salt
Freshly ground black pepper