Poached Cod fish in an Miso Spinach Broth

Name: Poached Cod fish in an Miso Spinach Broth
Ingredients: 2 tablespoon(s) olive oil; 1 1/2 teaspoon(s) sesame oil; 1 medium onion chopped; 2 cup(s) chopped mushrooms; 2 clove(s) garlic chopped; 1/8 teaspoon(s) red pepper flakes; 2 cup(s) baby spinach large stems removed; 2 cup(s) chicken broth; 3 cup(s) water; 1/3 cup(s) soy sauce; 1/2 cup(s) mirin rice wine; 3 tablespoon(s) fish sauce; 2 teaspoon(s) ginger; 3 tablespoon(s) miso; 4-6 - thick cod fish loins; 1 package(s) pre cooked udon noodles