1. In a big pot saute the onions in olive oil for about 15 minutes over medium/low heat, add the carrots and celery season with salt cook for about 15 minutes. Add the tomatoes, peppers and the peeled tongue. Cover with water. Season with salt using a light hand. (The sauce will be reduced later so in this case you are not salting to taste until the reduction), bring to a boil and reduce heat to a very gentle simmer, add the bay leaves and cook for about 2 hours. Algerians tend to cook tongue to a very soft texture, if you like your tongue a little firmer, well then stop cooking it when it's done to your liking.