Add the remaining seasonings. Start with about a tablespoon of nutritional yeast, a few shakes or teaspoons of the spice blend, and black pepper as desired. Taste, and add additional as desired.
Cover and let simmer on medium-low for 15-20 minutes until squash has softened and broth has slightly thickened. Remove the ramen from the heat and add about a half-cup of the broth to a glass jar (careful not to touch if hot). Stir in about a teaspoon or 2 of miso until evenly dispersed. Add this mixture to the rest of the ramen. Taste and repeat as needed to reach desired miso flavor.