Is it the cow & gate one suitable from 4 months? If so it seems to be approximately fruit puree + baby rice made up with milk. The ingredients are: Baby-Grade Fruit (Apple, Banana, Orange),Milled Cereals (Corn, Rice) ,Demineralised Whey Powder¹ ,Skimmed Milk Powder¹ ,Vegetable Fat (contains Emulsifier: Soya Lecithin) ,Calcium ,Vitamins¹ ,Iron ,Zinc ,?Vitamins: Vitamin C, Niacin, Vitamin E, Pantothenic Acid, Thiamin (B1), Vitamin B6, Vitamin A, Folic Acid, Biotin, Vitamin D 3 ,Prepared with 82g Fruit, 45g Fortified Milk and 28g Cereal per 100g dry product ,Contains: ¹Milk.
To make something similar you could use a recipe like this one or just cook some apple and puree with a bit of banana and orange juice and stir in some baby rice and milk. I would try to use fairly sweet apples as cooking apples can be a bit sour and you can definitely cook dessert apples.