A cleansing diet is a nice middle of the road path to cleansing and detox. It's not as disruptive to your life as the more rigid fasting methods, but drastic enough to get, and keep, your attention on a new eating regimen.
While fruit fasting and rice fasting are easier and milder to perform, causing less disruption to your life, a cleansing diet goes a step further. Instead of eating just one food, you eat a variety of natural, wholesome, nutrition-packed foods.
The point is to eliminate the foods that are contributing toxins and possible allergens to your system, including the toxins in microwaved food, and to lessen the quantity and complexity of foods your system must handle.
This break from regular heavy eating gives your body a chance to "catch-up" on internal housekeeping, neutralizing and expelling toxins and waste materials, while still allowing yourself a somewhat normal eating routine. You will not detox as quickly as with a more traditional fast, but you will cleanse nonetheless. And it will be much more comfortable than pure fasting.
When you stop eating the foods that are annoying to your body, you not only give your system a rest from the onslaught, lessening the burden, but you also give it a chance to clean up and clean out. A chance to neutralize and eliminate any stored toxins and wastes it was too over burdened to deal with at the time.
Your body, in its infinite wisdom and complexity, can handle these elements, but it needs the appropriate energy and resources to do so.
At first, as some of this stored material is released, you may have mild typical detox symptoms of tiredness, aches and pains, sinus discharge, headaches, nausea -- but much milder than if you were fasting.
You can use dry skin brushing to help facilitate the removal of these toxins. And take 1-2 tablespoons of psyllium husks (a natural laxative and colon cleanser) daily to help clear the colon, or see here for a colon cleanse recipe and more information on psyllium. There are other methods for cleansing the colon, as well.
This isn't to say that our bodies are "dirty", or "toxic", or "broken". They do a pretty good job of keeping us alive and compensating for all we throw their way (stress, over-eating, lack of sleep, lack of exercise, etc.). Our goal is not so much to "fix" something that's wrong with our bodies, as it is to "get out of the way" of their natural tendency toward health.
Once you get started with a cleansing diet, the break from your normal eating habits will shed new light on why you were eating the way you were, same as a fast.
Kitchari is an Indian dish often used for cleansing. When used alone as a mono-diet, it's called a kitchari cleanse, but it can be used in conjunction with other wholesome foods as a part of a cleansing diet. The link above has several different kitchari recipes.
Of course, any whole grain, with the exception of wheat, can be an excellent part of a cleansing diet, but be sure to soak the grain first to neutralize the phytic acid so it doesn't interfere with mineral absorption. Wheat can be included once you're sure you aren't wheat-sensitive.
Some cleansing diets, as prescribed, will just sound like good eating sense to you. Fruit for breakfast, salad for lunch, rice and beans for dinner--it's the way we should be eating anyway. Sticking to this routine can, for some, just feel like they're on another "diet".
So shake it up a bit more. Remind yourself it's a cleanse. And not just a physical cleanse, but also a mental, emotional, and spiritual cleanse. Take time to assess your habits in those areas as well. Take time to spend with yourself, to reach inward. To listen quietly to the messages that are always there.