When you make your dinner, allow some of the vegetables to cook longer so they become very soft, but not so long that they lose most of their vitamins. Then allow them to cool. Don't season the vegetables, as your little one doesn't need or probably want salt or spices. Then blend the vegetables with a little water, formula or breastmilk until the desired consistency. Remember, some vegetables will naturally have more water or juice and it is possible to make the food too runny.
Fruit is basically the same.
It must be cooked before hand to preserve it and soften it. Start with fruits such as apples, peaches, pears. Bananas can be frozen also. They don't need to be cooked and may turn brown, but will still be okay and baby won't mind the color. Next area is meats.