Black Vinegar Chicken With Radishes

Name: Black Vinegar Chicken With Radishes
Ingredients: 1 2 piece ginger, peeled, finely chopped; ⅓ cup black (Chinkiang) vinegar; 3 Tbsp. soy sauce, preferably low-sodium; 1 Tbsp. sugar; 1 Tbsp. toasted sesame oil; ½ tsp. crushed red pepper flakes; 4 skinless, boneless chicken thighs (about 1 lb.), cut into 1 pieces; 2 Tbsp. cornstarch; 2 Tbsp. (or more) vegetable oil, divided; 1 bunch radishes, trimmed, halved, quartered if large; Cilantro leaves with tender stems and steamed rice (for serving)