Baked milk is very easy to prepare in a thermos. Just boil the milk, immediately pour into a thermos, close and leave for 6-7 hours
Prepare fermented baked milk in advance for serving: cover a colander with a kitchen towel or gauze folded several times. Place a colander on a bowl or saucepan. Pour the fermented baked milk into a colander and let the excess liquid drain for 1 hour.
Beat eggs with sugar, salt and whey drained from fermented baked milk with a mixer until smooth. Add 200 ml of baked milk at room temperature and whisk again. Continuing to beat, add flour and soda to get a homogeneous mass.
Bring the remaining milk to a boil and pour into the dough, mix quickly. Add slightly warmed oil and mix with a spoon.
Heat the pan well, grease with oil and bake thin lacy pancakes over high heat. Before each next pancake, lightly coat the pan with oil. Put the finished pancakes in a bowl or pan under the lid. Serve hot, with thick curd.