Add the veggies of your choice to the pot and simmer for 15 minutes, or until tender. When your veggies are almost tender, add the noodles. Cook for about two minutes (or however long your package says).
Once the noodles are tender, remove from heat, add green onion tops, miso mixture, and tamari and stir to combine.
Taste and add more miso or tamari if desired. Serve hot. Garnish with sesame seeds, if desired.