In a large pot filled with salty, cold water, add potato pieces and bring to a boil. Cook for 10 to 12 minutes or until just fork-tender. Drain and set aside.
SAAG
In a large skillet over medium-high heat, add ghee and oil. When hot, add cumin seeds and mustard seeds; sauté for 1 minute.
Reduce heat to medium and add onions; season with salt. Sauté for 5 minutes.