If you don't already have epis made, make Instant Epis.
Process the bell pepper, garlic, scallions, thyme, parsley, cloves and bouillon cube in a food processor until finely ground.
Alternately, use 1/2 cup of pre made epis.
In a large pot, combine beans, epis, Scotch Bonnet and 4 cups water.
Stir and bring to a boil.
Reduce to a simmer and cook until the beans are very tender, 45 minutes - 1 hour
Let cool for a few minutes.
Remove the Scotch Bonne and discard if desired.
Puree most of the beans and water, leaving maybe 1/3 cup of whole beans in the pot. Puree the Scotch Bonnet with the beans if you did not discard it.
Strain the bean puree if you prefer a more refine sos pwa or return the pureed beans to the pot as is and stir in the rest of the water.
Add salt.
Bring back to the boil and simmer for another 10 minutes for the Sauce Pois to thicken.
Add coconut milk if using and simmer for another 5 minutes.
Serve with steamed rice.