Just about any ingredient - meat, vegetable, poultry, seafood, fruit - can be added to the clay baker. You can roast a chicken, roast some beets, or roast garlic - the possibilities are endless. The clay baker can also be used to bake bread.
Since the food is slow-cooked in steam and its juices can't escape, food cooked in a clay baker doesn't require the addition of fats such as oil or butter. Also, food cooked in a clay baker comes out very juicy. Cooking with a clay baker saves a lot of time as well - an entire family meal can be cooked in a clay baker. For example, one could place a whole chicken, some potatoes, some carrots, some broccoli, and some garlic in a clay baker, and have a complete meal in under a hour.
• See their line of bakers at Romertopf's website