Step1:No butter. No saffron. Fry chopped onions in a small amount of neutral oil until soft. Add cooked or canned black beans. Pour in the soup. Fry for at least 5 minutes. Then add corn and heat through. Fry an egg. Put it on top. Sprinkle some coriander. Decoration - green lemon corner.
Cooking tips:There are skills in making delicious dishes.