Raw materials of hot and sour melon skin: 350g watermelon skin, appropriate amount of coriander, red sweet pepper, lemon, soy sauce, salt, sugar, balsamic vinegar, Chili oil, garlic, sesame oil and pepper oil. Practice: Wash the thick watermelon skin, remove the red pulp and green skin, and cut into thin slices; Soy sauce, salt, sugar, balsamic vinegar, Chili oil, garlic, sesame oil and pepper oil are mixed into a sauce, and a little lemon juice is added; Put shredded watermelon peel, shredded red bell pepper and shredded coriander into a container; Finally, add the prepared flavor juice, mix well, and marinate in the refrigerator for 10 minutes. Stir-fried watermelon skin Ingredients: 350g watermelon skin, sweet red pepper, chives, garlic, black pepper, salt, sugar and oil. Practice: Wash the thick watermelon skin and remove the red pulp and green skin; Slice watermelon peel, sprinkle some salt for curing 15 minutes, then flush to remove salt and squeeze out water; Shred red pepper, pat garlic flat, wash shallots, and mince chopped green onion; Add some oil to the pot, heat it, pour in sweet red pepper and garlic and stir-fry for 2 minutes; Pour in the drained watermelon peel and stir-fry for 3 minutes. Add some salt, sugar, black pepper and chopped green onion to taste and serve. Stewed ribs with watermelon skin Ingredients: 200g of watermelon skin, 200g of ribs, 2 slices of ginger, and appropriate amount of salt. Practice: wash the ribs and blanch them with boiling water; Pour water into the soup pot, add ribs and ginger slices, boil over high fire, and then turn to low heat for about 40 minutes; Wash watermelon skin, remove red pulp and green skin, and cut into small pieces; Put the melon skin into the soup pot and turn to high heat. After boiling, turn to low heat for 20 minutes. Season with salt and serve. Watermelon peel as jam material: watermelon peel 600g, sugar 100g, a little lemon juice. Practice: Wash the watermelon skin, remove the outermost thin green peel, cut off the red pulp inside, then cut the watermelon skin into small pieces, put it in a blender and add a proper amount of water to break the watermelon skin; Pour the broken watermelon peel into a stainless steel pot, add sugar and lemon juice, stir well, turn to low heat after boiling, stir with a spatula in the middle, and turn off the heat until the water is dry; Air-dried until it is warm, it can be put into bottles or fresh-keeping boxes, completely cooled, sealed and stored in the refrigerator. After 2 ~ 3 days, the sauce will become thicker than before and you can eat it. When eating, scoop with a clean and waterless spoon, dip in bread or mix with porridge.