2/3 cup reduced sodium soy sauce
1/2 cup chicken stock
1/4 cup honey
2 tablespoons rice wine vinegar
2 tablespoons brown sugar, packed
3 cloves garlic, minced
1 tablespoon sesame oil
1 tablespoon cornstarch
1 teaspoon Sriracha, or more, to taste
1 teaspoon ground ginger
1/4 teaspoon red pepper flakes
1 tablespoon olive oil
1 pound flank steak, thinly sliced across the grain
1 head broccoli, cut into florets