Soak the peas in cold water overnight, then drain and discard the water.
Bring the bacon to the boil in 2 liters of cold salted water, cover and cook over a low heat for about 1 1/2 hours, remove, cut into small pieces and keep warm.
Now add the peas, pearl barley and soup vegetables to the broth and simmer covered for approx. 45 minutes over a low heat. Add the potatoes and cook for another 20 minutes. Add the bacon again, season with salt and pepper and serve sprinkled with parsley.