1. Old rock sugar 2 kilograms.
2. Scrub the lemon with salt.
3. Slice the lemon, remove the seeds, and put it in a rice cooker.
4. Spread all the rock candy on top.
5. Press the porridge button and keep it warm after it is boiled, otherwise the sugar water will overflow, which is the appearance of freshly cooked porridge.
6. Just keep it warm for three hours, then put it in a glass bottle after allowing it to cool.
7. The sweet and sour rock sugar lemon balm is ready.
Tips:Be careful when cooking, and be careful of overflowing sugar water.
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