Quick Ramen Chicken Noodle Soup

Name: Quick Ramen Chicken Noodle Soup
Ingredients: 3 tablespoons canola or vegetable oil; 2 cups (1-inch) diced, scrubbed carrots (3 carrots); 3 tablespoons fresh ginger, peeled and minced; 1 tablespoon minced garlic (3 cloves); 7 to 8 cups good chicken stock, preferably homemade; 2 large cooked chicken breasts or 1 small rotisserie chicken; 1 tablespoon soy sauce, such as Kikkoman; 1 tablespoon miso paste, optional for extra layer of umami; 1 teabag-style of dashi, optional for extra level of umami; 1 (3-ounce) package ramen noodles, (I use frozen udon); 8 ounces baby bok choy, leaves separated and cleaned, or spinach; scallions, cut diagonally, optional to sprinkle on top