Curried lentil patties with minted yoghurt

Name: Curried lentil patties with minted yoghurt
Prep time: 40 min
Cook time: 25 min
Total time: 1 h 5 min
Cuisine: Indian
Ingredients: 400g orange sweet potato, peeled, chopped; 2 x 400g cans lentils, drained, rinsed; 36.40 gm olive oil; 1 medium brown onion, finely chopped; 10.00 gm mild curry powder; 2cm piece fresh ginger, peeled, finely grated; 2 medium zucchini, grated; 125.00 ml dried breadcrumbs; 250g Greek Style Yoghurt; 82.50 ml finely chopped fresh mint leaves; Salad leaves, to serve; Lemon wedges, to serve