For 6 yogurts, we will need 1 liter of milk and a cup of plain yogurt.
Building on sunny days "Salta la Linda" yogurt made for the whole family, very easy and inexpensive.
First place in the solar cooking pan with a liter of milk until it rises to about 70 ° C, measured with a thermometer, too, can measure temperature with the tip of the little finger (which is the sensitive), in milk, will be ready when still burning but can hold a finger inside, a few seconds.
Then remove the pot from the kitchen and quickly opened a glass of natural yogurt and mix with warm milk stirring vigorously at that time there will be about 50 º C. Then put the preparation divided into six glass jars, cover and quickly put them in a cooler (you can use solar cookers), covering with a blanket before closing, we leave in about 6 hours. After that time we will the jars in the refrigerator and after about four hours will be thick and ready to eat. After a few days it will be even thicker and even tastier, should be consumed within a week, from their manufacture.
Salta - Argentina