Start the way 99% of all my delicious things start, by gently frying onion and garlic until they have softened. Throw in the can of fava beans and stir.
A note on which type of bean you buy here. The Asian markets tend to sell cans of Ful which are already prepared and supposedly ready to eat with subtitles like ‘Egyptian recipe’ or ‘Palestinian recipe’, I have tried many of the varieties and in my experience they can be hit or miss regarding taste. I usually drain the beans so the flavours are of my own making. With a plain old can of beans from a supermarket, you are starting from scratch anyway.
Add as much cumin as you are comfortable with. I put in about two heaped teaspoons. Season with salt and pepper, give it a stir and let it simmer until the mushrooms have released their moisture. You could always add more spices and ingredients you like, a little chilli if you want some heat for example. I like to simmer it until it is quite a stiff consistency but you might like a looser mix. Add water if it is too thick for you or keep simmering if it is too watery. Simple.
While you are simmering you can chop up some spring onions and heat up some pita breads in the oven or in a toaster.