In the world of dreams the rules of reality do not necessarily apply. Each dream is unique and it's a direct link to the soul and spirit. Psychology provides its own theories on what dreams mean, but so did tradition and the study of dreams for thousands of years before any relevant science had developed.
Dream Meanings - Oven
To dream of an oven with lots of loaves signifies profit and joy. If the oven is lit then you will overcome all your obstacles but if the oven is turned off then expect mishaps and troubles at work.