Boil fava beans (include liquid from the can) in saucepan, then lower heat and simmer. Mash and cook down until similar to the consistency of refried beans.
Add oil, cumin. Cook for 15 minutes over low heat. Add chili powder until it reaches desired spiciness.
Serve in bowls, garnishe'd with chopped tomatoes, onions, and peppers. To eat, use fresh bread to scoop.
We ate this for breakfast every day in Ethiopia. It is a traditional African/Muslim breakfast dish, and there are probably many variations, but this is the way its made in Addis Abeba.