I got some of the mystery sauce last night from Qismat... here's my best attempt at duplicating it (its basically spiced onions, thanks to the poster of the original recipe):
1x large onion
1x teaspoon of salt
1x tablespoon of hot chilli powder (adjust to suit taste - i like 'em spicy)
1x tablespoon of mint sauce
6x tablespoons of tomato sauce
Red food colouring
dash of lemon juice
Peel and very finely chop/dice the onion, place in a bowl, add the salt, chilli powder, mint sauce, tomato sauce and lemon juice
Mix well (a hand blender is good for chopping the onions up even finer), add food colouring to give it that glow in the dark vivid bright red colour ;D
Dilute mixture with water to suit