You can prepare baby food at home from all the commonly available fruits and vegetables. While starting on semi-solids, use only one fruit or vegetable type to feed your baby. Stick to the same food for four or five days before you try out other fruits and vegetables. Do not mix many fruits and vegetables as they might not be compatible and if you are checking your baby for allergy you will not know the offending food from the others. Pureed or mashed banana, stewed apple, carrot, spinach and potatoes are great ideas to start from before you try other fruits or vegetables.