Preheat the oven to 425 Line a baking sheet with aluminum foil and grease it.
Peel and cut potatoes into cubes. I cut each potato into 30 – 36 pieces.
Soak them in water until ready to use. This step can be skipped. This avoids the discoloration of potatoes and also helps remove some excess potato starch. I soaked for 30 minutes but can also soak for longer period. When ready to bake, remove potatoes from water and pat dry with paper towels.
In bowl prepare the marinade by mixing together oil and all the spices except the ingredients listed under additional seasoning.
Add potatoes, onions, green chilies to spiced oil and toss.
Spread the potatoes on baking sheet, picking out the onions and chilies. Keep aside the onions and chilies. OR when tossing the potatoes with spices, do not add onions and chilies. Once the potatoes are arranged on the baking sheet, add onions and chilies to the bowl of spice mixture and toss to coat the spices. Keep aside.
Bake potatoes in preheated oven, middle rack for 38 – 40 minutes or until potatoes are soft and evenly baked, stirring 2-3 times in between. I stirred 12 minutes, 24 minutes and 32 minutes into baking.
Twelve minutes into baking, add onion and green chilies to baking sheet, toss the potatoes and continue baking. Do not forgot to stir 24, and 32 minutes into baking.
Remove from the oven, taste and add more seasoning if required. I sprinkled ingredients listed under additional seasoning and mixed well. When served with rice, these potatoes were moderately spiced.
Serve with rice or as a side dish, with roasted / baked chicken or meats. These can also be served as a snack.