Spicy Rock Shrimp with Preserved Vegetables and Toasted Couscous

Name: Spicy Rock Shrimp with Preserved Vegetables and Toasted Couscous
Ingredients: 1 cup bonito flakes; 8 cups water; 1/2 pound shiitake mushrooms, julienned; 1 daikon, peeled and cut into small rounds; 1/4 cup rice wine vinegar; 1/4 cup sake; 1/4 cup mirin; 1/4 cup soy sauce; 1/2 teaspoon dashi powder; 2 tablespoons sugar; 1 bag Israeli couscous; 1 bunch scallions, julienned on the bias; 1 cup fava beans, blanched; 1/2 pound rock shrimp; 1 jalapeno, small dice; 2 ounces fresh ginger, peeled and small dice; 1 small shallot, diced; 1/2 teaspoon minced garlic; Dash cayenne pepper; Dash sambal olek; 2 tablespoons hijiki