I believe Americans know this as peas porridge from the Nursery Rhyme. I include this for my daughters in case some day they decide to make them for their Dad.
Whole Dried Peas, soaked overnight, covered by 2 inches of water
Drain and rinse the peas
Put them in a large pot, cover with water
a pinch of baking soda (I know this is not necessary but this is what Nanny said to do)
1 Tbsp. sugar
Simmer for about one hour until soft. Add water if necessary.