Firstly, dice the onion, celery and carrots. Also, grind the garlic. Then, fry the garlic, onion, celery and carrots quickly in little hot fat with vegetable oil in a large pan for about 5 minutes.
Add chicken broth, chicken breast, 2 cups of water, some pepper and sprigs of dill in the pot. Let it simmer for 30 minutes. Mix matzo ball dough in simmering soup.
Now, to make matzo balls, stir the eggs and vegetable oil in a bowl. Also add salt, matzo meal, baking powder and pepper in it. Mix them properly.
After mixing, add 3 tablespoons of water and mix it again until it smoothens. Then, cool the mixture for 30 minutes so that matzo meal absorbs the moisture.
Now, carefully remove the chicken breast from simmered chicken soup. Shred the chicken breast and put it back into the soup.
When the matzo meal is ready, form it in the shape of a ball and put the balls into the soup. Let it simmer for 20 minutes.