In a wide mixing bowl add diced potatoes
Add sour cream, chat masala, turmeric powder, tandoori masala, garlic powder, ginger powder, salt, oil, and lemon juice and mix everything well
Close the vessel with a lid and refrigerate; let the marination sit for at least 1 hour
For baked version
Preheat the oven at 400 deg F
Place aluminum foil/ parchment paper on a baking tray and grease little oil
Arrange the marinated potatoes in the baking tray without touching one another and brush little oil over the potatoes
Baked for 10 minutes and pull out from the oven; mix well
Repeat the process. After baking for 30 minutes. I baked for 5 minutes and tandoori aloo was ready
For stovetop:
Add little oil to the pan and let the oil gets hot
When the oil is hot carefully add marinated potatoes without touching one another
After one side is cooked and turns crispy, carefully flip cook all other sides. Serve hot