Wazobia Restaurant opened a few months ago across from Tappen Park in Stapleton, a mile south of the ferry terminal along Bay Street. Their sign said 'African and American' food, so I wasn't sure what to expect. However, the menu and food are completely unapologetic Nigerian cuisine. They were tickled to have diners straying in from outside SI's small African community, and were eager to make suggestions. My wife and I had fried beans cakes in spicy tomato sauce, stewed goat with jollof rice, and fried beef in locust bean sauce. Everything was rich, spicy, and delicious. Meat dishes were served with more parts than we are used to--a large slab of fried skin/fat with the goat, chunks of fried tripe and organ with the beef. All delicious, and surprising. More adventurous options are available as well--goat head, land snails, honey bean cake/boiled egg/flaked fish. We didn't have anything with fufu, but will give it a try our next time there. Limited options for vegetarians, but you could probably put a meal together, and I'm sure the proprietors would be eager to help.
Pleasant hole-in-the-wall ambience, though not particularly cheap (most mains $10-$15)
Regardless, well worth a visit.
611 Bay Street
Staten Island, NY 10304