Step 1

Heat the oil or lard in a frying pan over a medium-low heat.

Step 2

Start frying the onions until they are transparent and start to brown.

Step 3

Add the beans and mash down using a potato masher until they become a paste. Blend to a smooth puree and then add them to the frying pan where the onions are being browned. "They will become a thick puree, keep scrapping from the edges and bottom of the pan. If you prefer to add a little more oil, this is the time".

Step 4

Tilt the frying pan sideways and form a roll with the bean paste. I like to flip them like pancakes a little bit. Taste to check if it needs salt.