Sweet Potato Lentil Patties and Salad

• 600 g sweet potato, roughly chopped
• 400 g tin brown lentils, drained
• 1 tsp cumin
• 1 tsp chilli powder (optional)
• 0.25 cup coriander (cilantro), roughly chopped
• 0.25 cup bread crumbs
• 100 g tzatziki
• 200 g rocket leaves
• 200 g cherry tomatoes
• 1 pomegranate