Colcannon is a traditional Irish mashed potato dish, and is a hearty and comfort food classic in Ireland.
Peel the potatoes and cut into large chunks and place into a large saucepan. Cover with water and add salt. Bring the potatoes to a boil and then reduce to a simmer and allow to cook about 15 or 20 minutes or until fork tender.
Remove potatoes from the simmering water and put into a bowl, and add the shredded cabbage and scallions to the simmering water. Allow it to simmer for 1 to 2 minutes, or until tender.
Meanwhile, mash potatoes with a hand masher, add salt, pepper (to taste), butter and milk until desired consistency. Then add drained cabbage or kale and scallions. Stir well until light and fluffy. Serve immediately.