Apple puree or compote is widely consumed as a dessert on the continent but isn't such a familiar product in the UK, except as baby food.
However, it is available, you just have to know where to look: I found a large jar of organic apple compote in my local health food shop, and Waitrose/Ocado stock Clearspring Organic Apple Puree. Alternatively you could always use something like HiPP Organic Simply Apples or Cow & Gate 4 Month+ A Taste of Apple - you want something that is 100% apple, with no added sugar or other ingredients, except perhaps asorbic acid (Vitamin C). Or you could make your own of course - peel and chop the apples, put them in a saucepan with a little water, cover and cook for 6-8 minutes until tender, then puree until smooth.