Preheat the oven to 425 degrees F.
Wash and pat dry the sweet potato. Place the sweet potato on a piece of aluminum foil. Sprinkle quarter teaspoon salt and fold into a wrap. Bake in the oven for 45 minutes, or until a knife inserted goes in without any effort.
Cool. Peel and chop into one inch cubes.
Heat ghee/oil in a pan, add the sweet potatoes and roast until crispy on the edges, taking care not to make it mushy. This may take about 5 minutes.
Add chaat masala and one eighth teaspoon salt, and cook for two minutes. Transfer to a bowl.
Add the onions, chili, ginger, tomatoes, lemon juice, and salt. Combine thoroughly.
Transfer to serving bowl, sprinkle pomegranates and sev. Chutneys can be served optionally. Serve immediately.