Complex sentence: Finally, the mush is stewed for a couple of hours in large pots, with added sunflower oil and garlic, in order to condense and reduce the water, as well as to enhance later conservation.
Split into simpler sentences: Finally, the resulting mush is stewed for a couple of hours in large pots. Sunflower oil and garlic are added at this stage in order to condense and reduce the water, as well as to enhance later conservation.