Cook the beans, strirring occasionally, in the boiling water until when squished between two figers they skin opens. If you need to add more water occasionally, it should be very hot. since cold water will toughen the beans.
Add salt to taste 10 minutes before turning off flame.
Take away from flame and set apart.
Brown the bacon in hot cooking oil and add to it the onion and garlic.
Add to the bacon sauté the beans along with the epazote sprig. Let it come to a boil, and then add the chile and the pork rind.