We got some large ice cube trays and a load of fruit and veg and just peeled and steamed/boiled them individually at first then together, and mashed them down with a fork when they were easy to mush then freeze.
We started with pear, then apple, then courgette, carrot (that takes a while to cook till soft) and so on. I added ground millet after a while and millet and apple became a favourite. Then red lentils, peas, split peas, bananas, leafy green veg and quinoa were added. I think we added potatoes after that, and pasta and bread after a year (we're an atopic family.) I can't remember when we introduced dairy. I think they had yoghurt and cheese from about 9 or 10 months. We used natural yoghurt with stewed fruit in it.
We started at 6 months, giving one ice-cube sized portion once a day, quickly building up to 1 cube 3 or 4 times a day, then up to 2 cubes. Then gradually they had lumpier portions and more of it. Finger food I think was bits of melon, water melon, gluten free crackers, rice cakes, bananas, soft, chopped pears.
I have heard good things about Annabel Karmel's recipes.