You can make minced meat or buy it ready-made. Add a finely chopped onion to the minced meat, pepper with freshly ground black pepper and salt with sea salt (any). Connect. Beat in the egg and put 2 tbsp of white grated breadcrumbs. Carefully knead and shape the meatballs. From 400 g of minced chicken, I got 30 pieces of meatballs D~2.5 cm. Pour water into a saucepan, bring to a boil, add a little salt and put the meatballs there. Cook until tender. This is about 10 minutes. Caught with a slotted spoon in a bowl of some sort. Leave the broth for the soup, having strained it. If you have chicken broth ready, you can use it instead of water. The soup will be richer and more satisfying. I use water.