Kitchari is the detox cleansing food diet of choice in Ayurveda-land.
It is a mono-diet which means that it gives the digestive system a rest while still giving nourishment and satisfying the cardinal rule of stimulating the 6 tastes with each meal. You can use this for a day or two or weeks on end as it is completely nourishing.
The recipe gives you a meal in a pot of mushy white basmati rice and mung beans which are well cooked and easily digested as well as nourishing. (Brown rice can be harsh on the digestive tract and require too much work when the body is in clean-up mode.) The Ghee adds the warm oily finish to nourish and moisturize the GI tract,
Herbs and spices act medicinally to do things like heal the gut (turmeric) warm the gut (ginger, pepper) and otherwise break up, liquify and disperse any ama (undigested matter and gunk) in the system and putting it into the digestive tract for processing and finally, elimination.
Vegetables can be added to the stew to avoid constipation and add nourishment. Add the denser veggies (like diced squash, roots veg carrots, beets, parsnips) during the last 20 minutes of cooking. Spinach, arugula and sprouts can be stirred in at the last minute along with the ghee or oil of choice.
I like to add cayenne or hot peppers for extra zing.
For Vegans: Go for the olive oil or coconut oil instead of ghee.