Warming, substantial yet incredibly healthy and simple to make. Great for winter evenings. 1 sweet potato, washed 1 red onion, sliced 1 box (150g) chesnut mushrooms, washed and sliced 1 stock cube (vegetable Kallo is my fave) 1 tin baby tomatoes 1 tsp marmite Dried rosemary, about 1 tbsp 250g minced beef (5% fat) (to…