How To Reduce Body Weight Without Using "Medicines"?

Weight is an important factor in our health. Overweight or underweight, little bit deviation from normal is acceptable. But gross deviation is not acceptable. 
Overweight is due to the excessive amount of fat stored in the body. Calculating BMI is one way to measure our physique. Bmi chart gives a rough idea about your physique. If you sense that you are really obese, then you can try to shed some weight.
Lot of" medicines" are available in the market to shed weight. Most of them have many side effects. Instead of using medicines, you can shed weight just by following a healthy diet.
It is simple. Usually, we eat thrice daily. Breakfast, lunch and dinner. From now you eat breakfast and dinner as usual. But for lunch, follow a healthy diet.
Means, eat just vegetables and fruits. Cooked or raw vegetables, whichever you like. Eat stomach full. No restriction of the quantity of veggies and fruits. But don't eat the usual meals. Don't eat rice, wheat or whichever has more carbohydrates.
If you feel hunger during evening snacks time, again have fruits. As I said before, follow the usual diet for breakfast and dinner. 
In this way you can shed at least 2 to 3kgs per month, that is around 15kgs in 6 months! in a healthy way. Without medicines.