The fruit of the apple tree. Has a round, oval or elongated shape, thin skin, white and juicy flesh, and a core with small brown seeds. Apples can be yellow, green, red or almost white in color. They contain a very large amount of ascorbic acid, fiber, iron. Apples also contain vitamins B, A, H and PP, potassium, calcium, phosphorus, sodium, molybdenum, zinc, etc. Sweet-sour apple varieties include Simirenko, Golden Delicious, Gloster, Royal Gala, etc. It's best to consume these varieties fresh. Sweet-sour apples are also added to salads and desserts, they are made into preserves, jam, compote, as well as pancakes, filling for pies, patties, crepes, strudel, charlotte, as well as juices, compotes, kissel, kvass, wine, cider, calvados and sweet-sour sauces. This variety of apples makes very good vinegar. They can be stewed with pork, beef, turkey, duck, can be baked, dried, marinated. And for the famous Russian dish – duck stuffed with apples, it's best to use slightly sour apples. To prevent cut apple from darkening, it should be sprinkled with lemon juice. An unpeeled apple weighs an average of 180 grams. A peeled apple – 140 grams. The same amount of puree can be obtained from it.