Just discovered something new that Hylke loves....
1 leek, 1 carrot, 2 good sized potatoes, a bit of broccoli/cauliflower(optional), small amount of butter to mash, cheese.
Boil all the veggies together until soft, drain off water and add butter and cheese, mash!!!
I have also tried this with boiled egg, Hylke loved it and ate his plate clean!!!