Pre-heat oven to 350 F degrees.
Take a baking sheet/pan and spray it with oil.
In a big bowl, add thin poha, half of the oil, salt, and all spices, and mix gently.
Now, place this mixture of poha in a single layer on the baking sheet.
In a pan, take remaining oil. When the oil is hot, add hing, and grated ginger followed by curry leaves and green chilies.
Cook them till the ingredients are infused in oil but not 100% cooked. (Takes about 1-2 minutes after adding to the oil)
Add nuts and dal at this point. Mix well and allow it to brown a little.
Add this oil over your poha and keep the ginger, curry leaves and green chilies aside.
Mix in the oil well and now add the half-cooked ginger, curry leaves and ginger to the top.
Roast at 350 F degrees for 10 to 13 minutes, stirring once in between until the poha starts to change color around the edges and turn crispy. If you are using a small baking sheet, then bake the poha in two to three small batches.