Chicken Meatballs With Sesame Green Beans

Name: Chicken Meatballs With Sesame Green Beans
Ingredients: 3 scallions; 1 large egg; 2 garlic cloves, finely grated; ½ cup panko; ¼ tsp. crushed red pepper flakes; 2 Tbsp. extra-virgin olive oil, plus more; 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt, plus more; 1 (heaping) Tbsp. tahini; 1 tsp. miso; 1 tsp. plus ⅔ cup plus 1 Tbsp. unseasoned rice vinegar; 5 Tbsp. sugar, plus more; 1 lb. green beans, trimmed; 1 lb. ground chicken; ⅓ cup soy sauce; Sesame seeds and steamed rice (for serving)