Kaddu Pumpkin Curry

Name: Kaddu (Pumpkin) Curry
Ingredients: 2 pounds Butternut squash; 2 tablespoons canola oil; 2 Green chillies, sliced in half; 1 teaspoon cumin seeds, mustard seeds, and fennel seeds,mixed in equal quantity; 1/4 teaspoon Chile powder; 1/4 teaspoon Turmeric powder; 1/2 teaspoon Coriander seed powder; salt to taste; 1 tablespoon sugar; 1 tablespoon lemon juice; 1/4 cup Chopped cilantro leaves