FILLING: Boil potatoes and carrots in a 4-qt. saucepan of salted water until tender, 8–10 minutes. Drain and then coarsely mash. Add 2 tbsp. oil to pan; heat over medium-high. Dry Roast the cumin seeds until they pop, 1–2 minutes. Add onion and ginger; cook until golden, 4–6 minutes. Allow to cool; stir into potato mixture with peas, cilantro, mint, garam masala, chiles, and salt.