Add kombu and water in a pot and heat at medium low heat. Remove kombu right before boiling. Or make Dashi of choice according to our Dashi recipe.
Cut green beans into 1 1/2" pieces. Slice carrot diagonally and cut into match sticks. Cut chicken into bite size pieces.
Cook chicken in the dashi at medium heat for 2 minutes. Add green beans and carrot and cook covered at medium low heat for 5 minutes.
Dissolve the miso paste in the soup.