Place leek and spring onions into the Thermomix bowl. Chop 3 sec/speed 5. Tip out into Thermoserver.
Place potatoes, milk, salt and pepper into the Thermomix bowl. Cook 20 min/100°C/speed 1.
Add butter and combine 10 sec/speed 4. Tip mashed potato into a large bowl with leek and onion. Add the kale and stir to combine.
Add seasoning to taste and serve with what else? Irish Stew!