Ingredients:

• 
  Dough
  4-5 cups of all purpose flour
• 1.5 cups of warm water
• 1 teaspoon of salt
• Tablespoon of butter
• 
  Stuffing
  1.5lb of ground beef
• 0.5-0.75lb of ground pork
• 2 onions
• Ground black pepper to taste
• Salt to taste

How to prepare, step-by-step:

1. Prepare ingredients:

   

2. Start off by making dough of water, salt and flour, I have detailed instructions on that here; cover ready dough with plastic wrap and set aside:

   

3. In the bowl mix ground beef, ground pork and ground onions (I used hand grinder to chop onions, you can use grater, blender or food processor); by the way you can go with ready ground meat or to grind meats yourself, if you chose to do so, grind onions together with meat:

   

4. Add salt (about 1 tablespoon) and ground black pepper to taste:

   

5. Mix it all good:

   

6. Now it is time to assemble dumplings. Take a portion of the dough to a wooden board dusted with flour (leave rest in the plastic wrap):
   

   

   

   

   
   
   
7. For each dumpling:
   

   

   

   

   
   

   

   

   

   
   

   

   

   

   
   
   
8. Repeat for all dough and mince, arrange ready dumplings on the plate dusted with flour; at the end I got approximately 3 plates like this:

   

9. Most of dumplings I froze up for the future use, left out only 2 portions for dinner. To finish up cooking (either frozen or just assembled pel’meni), bring a cooking pot full of water to boil, salt to taste; put portion of pel’meni to the boiling water, cook dumplings until they surface then let them simmer for 5-8 mins more:

   

10. Move cooked dumplings to a bowl using skimmer:

    

11. Smear with butter:

    

12. And serve for lunch or dinner with your choice of a dip: ketchup, mayo, sour cream whatever you like: