In a large bowl, combine flour, ghee, salt and caraway seeds until mixture resembles bread crumbs. Gradually stir in enough water to form a firm dough. Turn onto a lightly floured surface; knead until smooth and elastic, 6-8 minutes. Cover and let rest for 1 hour., Place potatoes in a large saucepan and cover with water. Bring to a boil. Reduce heat and cook until just tender, 8-10 minutes; drain. Set aside to cool slightly. In a large skillet, heat 3 tablespoons oil over medium heat. Add potatoes and cook until potatoes start to cling to the skillet, about 5 minutes. Stir in peas, ginger, garam masala, cumin seeds and salt; cook until heated through, about 2 minutes. Stir in optional ingredients as desired. Set aside., Divide dough into 6 pieces. Roll 1 piece of dough into a 10x6-in. oval. Cut dough in half. Moisten straight edge with water. Bring 1 corner of half moon up to meet the other corner of the half moon, forming a cone. Pinch seam to seal. Fill with 3-4 tablespoons potato mixture. Moisten curved edge of dough with water; fold over top of filling and and press seam to seal. Gently press the bottom of the samosa to flatten slightly. Repeat with remaining dough and filling., Preheat air fryer to 350°. Brush the samosas with the remaining 3 tablespoons oil. In batches, arrange in a single layer without touching in the air-fryer basket. Cook until golden brown, about 15 minutes.