Grilled Summer Salad With Creamy Miso Dressing

Name: Grilled Summer Salad With Creamy Miso Dressing
Ingredients: ¼ cup strained aquafaba (from one 15-oz. can chickpeas); 1 Tbsp. Dijon mustard; 4 Tbsp. apple cider vinegar, divided; ¾ cup vegetable oil; 2 garlic cloves, coarsely chopped; 2 tsp. finely grated lemon zest; ¼ cup fresh lemon juice; ¼ cup sugar; 3 Tbsp. white miso; 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt; 1 tsp. onion powder; ¼ tsp. celery seeds; 2 Tbsp. poppy seeds; 3 ears of corn, husked; 8 oz. shishito peppers; 2 Tbsp. extra-virgin olive oil; Kosher salt; 1 avocado, thinly sliced; ½ bunch cilantro, tough stems removed; 8 oz. cherry tomatoes, halved; ½ cup thinly sliced raw or pickled red onion