Shrimp and Gruyère Cheese Grits With Bacon and Mushrooms Recipe

Name: Shrimp and Gruyère Cheese Grits With Bacon and Mushrooms Recipe
Ingredients: 5 3/4 cups homemade or store-bought chicken stock, divided; 1 pound large shrimp, shelled (shells reserved); 3/4 pound mixed mushrooms, such as cremini, shiitake, and oyster, stemmed and thinly sliced (stems reserved); 3/4 teaspoon kosher salt, plus more for seasoning; 1/4 teaspoon baking soda; 1/4 teaspoon cornstarch; 1 cup grits, preferably stoneground (see note above); 1 cup grated Gruyère cheese (about 4 ounces); Freshly ground black pepper; 4 slices thick-cut bacon (about 4 ounces), diced; Vegetable oil (if needed); 1 medium shallot, minced; 2 medium cloves garlic, minced; 1/4 teaspoon cayenne pepper; 2 tablespoons unsalted butter, cubed; 1 tablespoon fresh juice from 1 lemon; 2 tablespoons mixed minced fresh herbs, such as parsley, chives, and tarragon, plus more as garnish