Sweet potato lentil pie

Name: Sweet potato lentil pie
Prep time: 10 min
Cook time: 50 min
Total time: 50 min
Yield: 6 portions
Ingredients: 30 g extra virgin olive oil; 1 garlic clove; 80 g red onion; 1 fresh long red chilli; 250 g water; 400 g canned chopped tomatoes; 400 g canned lentils; 1 tsp stock paste; 50 g tomato paste; 1 tsp white sugar; 1 tsp sea salt; ¼ tsp ground black pepper; 850 g sweet potato; 100 g crème fraîche; 100 g feta cheese; fresh basil; mixed salad leaves