Clay pot cooked foods are full of nutritionIt was scientifically proven that food cooked in clay pot is full of nutrition as compared to food cooked in aluminium/non-stick pans. For example, when dal cooked in pressure cooker, the dal burst out due to temperature, but never cook properly and we won't get sufficient micronutrient present in that. However, food cooked in clay pot never lost its micronutrient, and it tastes very delicious. Our body is made up of soil. When a dead body burnt everything except some bones merges with the soil. So, food cooked in clay pot is highly effective and healthier for us.
At Puri, in Jagannath temple, all items cooked in clay pots since its beginning. A layer of seven pots kept one after one, from below large size to top small size; and the head cook checks the top pot item whether cooked or not and confirm about all the rest six pots. The Puri Prasad/bhog cooked in clay pot lasts for a weak long without staling.