Bismillahi Rahmani Rahim
Salaam Alaikum wa Rahmatullah
I make my fuul from scratch, though I do try to keep a can or two around for emergencies!
I buy a big two-pound bag of dried fuul (small brown fava beans) and make a huge batch all at once. Rinse the beans, then soak at least overnight in plenty of water. Drain and rinse, then put in a pot with water to cover. Cook until tender, adding a bit of additional water as necessary.
At this stage, before adding any seasoning, I portion out the fuul into ziptop freezer bags, the place on a cookie sheet flat and freeze in my deep freezer. When I want fuul, I get a bag out the night before and put it in the fridge.
This will fill you up and keep you going well into the day!