Green Beans With Tahini Sbagliato

Name: Green Beans With Tahini Sbagliato
Ingredients: 1 lb. green beans, trimmed; 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt, plus more; 2 scallions, coarsely chopped; 1 garlic clove, coarsely chopped; ⅓ cup vegetable oil; ⅓ cup well-stirred tahini; ¼ cup apple cider vinegar; ¼ cup finely chopped dill; 2 tsp. finely grated lemon zest; ¼ cup (or more) fresh lemon juice; 2 Tbsp. white miso; 1 Tbsp. finely chopped cilantro; 1 Tbsp. onion powder; 2 tsp. agave nectar or pure maple syrup; 2 tsp. finely chopped parsley; Coarsely chopped dill and/or parsley (for serving; optional)