Very, very tasty dumplings recipe with mineral water (soda) 

Very, very tasty dumplings recipe with mineral water (soda)
Note:
A detail that I did not notice before is written up to 200 degrees in the oven paper box. I said 250 degrees, cook at 200 degrees. The cooking time may make a difference of a few minutes. Please adjust the cooking time according to the condition of your meatballs.
Materials:
1 large onion
0.5 kg of medium-fat ground beef
0.5 teaspoon of breadcrumbs (30 grams)
1 Teaspoon of salt (7 Grams)
1 full teaspoon of ground red pepper
1 Teaspoon of paprika (2 Grams)
1 Teaspoon of Cumin (2 Grams)
0.5 Teaspoon of black pepper (1 Gram)
0.5 pack of baking soda (2.5 grams)
1 tea glass of plain mineral water (soda)
2-3 tomatoes
6-7 Green Peppers