Potato Samosas and Mango Chutney

Name: Potato Samosas and Mango Chutney
Ingredients: 3 medium Russet potatoes peeled (about 4 cups when diced); 2 Tbsp. canola oil plus additional for frying; 1 tsp. whole cumin seeds; 1/2 cup red onion finely chopped; 1 tsp. coriander; 1 tsp. turmeric; 1 tsp. salt; 1/4 tsp. cayenne; 3/4 cup frozen peas thawed; 1/2 tsp. grated fresh ginger; pinch of sugar; 2 Tbsp. fresh cilantro finely chopped; 1/2 lime juiced; 1 package Ready-To-Fill Samosa Pastries available at Indian markets; 2 Tbsp. flour and cold water to make a paste to seal the edges of the samosas