Green Herb Tacos

Name: Green Herb Tacos
Yield: Serves 4
Cuisine: Mexican
Ingredients: ½ white onion, chopped; Micro cilantro; 2 limes, supremed; Makes 1 quart sauce; ¾ teaspoon sea salt, plus more to taste; 2 scallions, thinly sliced; 2 avocados; Sea salt, to taste; ¼ cup lime juice; 2 cloves roasted garlic; 2 tablespoons cider vinegar; 2 tablespoons olive oil; 1 teaspoon fresh oregano leaves; Micro cilantro (garnish); 1 tablespoons lime juice; ½ tablespoon chipotle powder; ½ jalapeño, seeded; ½ teaspoon sea salt; ⅛ teaspoon ascorbic acid or vitamin C powder; ¼ cup olive oil; Zest of 1 lime; ½ pint cherry tomatoes, quartered; 2 teaspoons cumin powder; 2 teaspoons chili powder; ½ cup raw pepitas (pumpkin seeds), soaked; ¼ teaspoon black pepper; 2 large chayote squash, peeled, halved lengthwise, pitted, diced; 1 teaspoon sea salt; 2 pounds king oyster mushrooms; 1 tablespoon olive oil