The coarse paste of crushed peanut shells called ombaz is normally considered waste, and only fit to feed cattle. But for many in Sudan’s Zamzam camp it is now all they have to stave off hunger pangs.

2. Slice the tofu into 6 blocks and set aside. In a bowl, mix the crushed cornflakes and peanuts with the curry powder and some salt and pepper. In another bowl, combine the peanut butter with the ...