Nigerian Yam and ‘Egg’

Name: Nigerian Yam and ‘Egg’
Cuisine: African
Ingredients: Yam (cut into thick round slices; outer skin peeled) - allow 2-3 slices per person; 1 pack regular tofu (not silken); 1/2 tsp turmeric; 1-2 tbsp sunflower oil; 1/2 red onion (finely chopped); 1/2 red pepper (chopped); 1-2 large tomato[es] (liquid centre scooped out; flesh finely chopped); 1/2 scotch bonnet pepper (finely chopped); 1 vegetable stock cube; salt and pepper to taste