Green Herb Tacos

Name: Green Herb Tacos
Yield: Serves 4
Cuisine: Mexican
Ingredients: 2 scallions, thinly sliced; Zest of 1 lime; ½ pint cherry tomatoes, quartered; ⅛ teaspoon ascorbic acid or vitamin C powder; ¼ cup olive oil; ½ teaspoon sea salt; ⅛ teaspoon ascorbic acid or vitamin C powder; 2 avocados; ½ jalapeño, seeded; ¼ cup filtered water; ¾ teaspoon sea salt, plus more to taste; Micro cilantro (garnish); Radishes, thinly sliced (garnish); 1 tablespoon salsa; 1 tablespoon guacamole purée; 1 tablespoon pepita cream; ¼ cup chayote; ½ white onion, chopped; ½ Roma tomato; 2 tablespoons olive oil; 2 tablespoons cider vinegar; Makes 1 quart sauce; ½ cup raw pepitas (pumpkin seeds), soaked; 2 roasted chayote squash; ¼ cup lime juice; ½ cup raw pepitas (pumpkin seeds), soaked; 2 pounds king oyster mushrooms; 1 teaspoon sea salt; 1 tablespoon olive oil; 2 cups barbacoa marinade