Pakistani Zucchini (Courgette) Curry

Name: Pakistani Zucchini (Courgette) Curry
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: Indian
Ingredients: 4 cups zuchinni; 1/4 cup cooking oil ((see notes)); 3 tbsp cooking oil; 2 serrano chillies ((see notes)); 1 tbsp panch phoran spice blend ((see notes)); 1 yellow onion; 2 tsp garlic paste; 4 roma tomatoes; 1 tsp red chilli powder; 1 tsp salt; 1/4 tsp turmeric powder; 2 tsp mango pickle ((see notes)); 1 lemon; 1/4 cup cilantro