According to Ayurveda, it is advisable one should eat foods with madhura rasa in the beginning of the mean, as these food are heavy and dense in nature and take more time to get digested. When we start eating, our digestive fire is powerfull and the body will be able to digest these foods more easily.
So start off with grains (rice/chapati), legumes (dal) and breads. You can also have kheer, halwa or mithai in the beginning of your meal.
Then, move on to the foods that have the sour and salty tastes. You can have curd or vegetables in the middle of your meal. the pungent, bitter and astringent food such as salad, pickle or chutney can be consumed next. At the end of your meal, it is advisable to take a very small piece of sweet (preferably jaggery) in order to satiate your sense.