Spicy duck egg masala hanser dim kosha

Name: Spicy duck egg masala / hanser dim kosha
Ingredients: 4 no duck eggs; 2 no potato cut into quarters; 1 cup thinly chopped onion; 1 no chopped tomato; 1 tablespoon ginger and garlic chopped; 3 tablespoons mustard oil; 1/2 teaspoon turmeric powder; 1 teaspoon cumin powder; 1 teaspoon garam masala powder; 1 teaspoon sugar; to taste Salt; 1 teaspoon cumin seeds