If you have already prepared the cheese, skip this step.
In a microwave oven, from 1 liter of fresh milk (long-term storage milk is not suitable) and 500 g of kefir, I quickly make tender cottage cheese or ricotta.
Pour milk and yogurt into a glass bowl, add a pinch of salt and heat for about 10-12 minutes, but without bringing to a boil. Carefully remove and, if it does not curdle very well, add a couple of tablespoons of lemon juice. Stir, let stand for 10 minutes.