Heat the oven to 200C. While the oven is heating, grind together the marinade ingredients to a paste. Coat the yam slices with the paste and roast in a heated oven for 20 minutes till the yam is roasted and nicely browned.
Set aside for cooling. In the meanwhile, chop all the salsa ingrdients together. I like to use my chopper for this. In the end add, olive oil and lemon juice.
Mix together all the salad ingredients with roasted yam. Some of the masala of yam will coat the leaves and impart flavour. Serve with a helping of green tomato salsa.