Prepare the pumpkin by removing seeds and cutting into bite-sized pieces. Trim tough skin areas. Slice carrot into 1cm rounds. Trim snow peas, microwave with 1 tbsp water for 30 seconds, cool in cold water, and cut diagonally.

In a pot, combine seasonings (mirin, sugar, soy sauce, dashi powder, and water), pumpkin, and carrot. Bring to a boil over medium heat, then cover and simmer on low heat for 6–7 minutes until vegetables are tender.