Jam is made from fruit and pectin and includes seeds/parts of the whole fruit. Puree is when the veggies, along with other ingredients like cream, are blended smooth. Sauce isn't always made from veggies or fruit, and usually includes spices, thickeners, and creams or butter. Jelly is made from fruit and pectin, but only the juice. Preserves are whole pieces of fruit saved in pectin, sugar, or salt.