Samosas (The Traditional Way + The Easy Way)

Bahan-bahan (4 porsi)

• 3 tablespoons vegetable oil
• 1/2 teaspoon mustard seeds
• half a small white onion
• 1 teaspoon finely-chopped ginger
• 1/4 cup frozen peas
• 1 Tablespoon ground coriander
• 1 teaspoon garam masala
• 1 teaspoon ground cumin
• 1 teaspoon salt
• ¼ teaspoon chili powder
• 1/4 cup water
• 1.5 pounds Russet or Yukon Gold potatoes, peeled and boiled until soft, then drained and mashed
• 1/4 cup chopped fresh cilantro, plus more for garnish if desired
• 1 package frozen phyllo pastry dough*, thawed
• 6 tablespoons melted butter, for brushing
• 4 (15-count) packages frozen mini phyllo cups*