To dream that you are eating jam indicates good news and new discoveries. Consider the cliche, 'caught in a jam,' which may mean that you may find yourself in some trouble.
To dream that you are making jam symbolizes a happy and blissful family life.
To dream that you are spreading jam indicates that you may be doing too many things at the same time - you cannot give enough attention to any of them. It would be worthwhile to learn to say no to commitments you cannot attend to.