Wash peas and soak overnight.
Then cover with water and bring to a boil.
When it boils, remove the foam, reduce the heat and cook for about an hour.
Potatoes, onions, carrots and lard cut into cubes, add to the peas and cook until the vegetables are almost soft.
Then put the stew, stir and salt. Keep on heat for another 10 minutes, stirring occasionally. If desired, in the soup when serving, you can add green onions and other fresh herbs.