Grilled Shiitake and Edamame Salad

Name: Grilled Shiitake and Edamame Salad
Ingredients: 1 pound shiitake mushrooms, wiped clean with damp cloth and trimmed; 2 cups frozen shelled edamame; 2 teaspoons vegetable oil; 2 tablespoons rice vinegar; 1 tablespoon plus 1 tsp sesame oil (plus more for drizzling on the salad); 2 tablespoons soy sauce (low-sodium); 2 teaspoons finely grated fresh ginger; red chili flakes or 1 fresh thai red chile (finely minced), to taste; 2 scallions, thinly sliced (white and light green parts only); gomashio (sesame salt), to taste -- can be purchased at Whole Foods or Asian markets, or prepared (see step 7); zest from 1/2 orange, finely grated